PH Level - 1301 Words
How pH levels impact tyrosinase activity
Abstract: The purpose of our research utilizing the different pH levels was to test how a specific pH level would impact tyrosinase activity. First we added 4.0 mL of pH in each corresponding test tube and then added 0.5 mL of substrate (catechol) into each test tube. In the instructions it says to apply your 0.5 mL of tyrosinase (potato extract) as well but you have to blank the spectrophotometer...
1,301 Words | 5 Pages
Ph Indicators - 298 Words
Preparing the Cabbage-Juice Indicator
Chop one head of red cabbage leaves into about 1-inch pieces and place them in a blender. Fill the blender about half full of water and blend the mixture at high speed for about 30 seconds.
Place a coffee filter inside a strainer and pour the cabbage juice through the coffee filter into a quart-sized jar.
Forensic Science Courses
Take Forensic Science Classes Online or Nearby - Start In...
298 Words | 2 Pages
Ph Meter - 1062 Words
A pH meter is an electronic instrument used to measure the pH (acidity or alkalinity) of a liquid (though special probes are sometimes used to measure the pH of semi-solid substances). A typical pH meter consists of a special measuring probe (a glass electrode) connected to an electronic meter that measures and displays the pH reading.
The pH probe measures pH as the activity of hydrogen ions surrounding a thin-walled glass bulb at its tip. The probe produces a small voltage (about...
1,062 Words | 3 Pages
pH Titration - 824 Words
Experiment 20: pH Titration: Phosphoric Acid in Cola Drinks
Post-lab Assignment or Report
The post-lab report for this experiment is due at the beginning of the following lab period.
Student notes for the lab will be available on the lab T-Square site.
Students will be able to...
• Use a known mass of solid acid to determine an unknown concentration of a basic solution
(this process is called “standardization”).
• Execute a titration using good, reliable technique....
824 Words | 4 Pages
All PH Essays
Ph and Osmosis - 1380 Words
The Effect of pH on the Rate of Osmosis Using a Glucose Solution
Melissa Werderitch Biology 157 11/6/06
In a journal article written by Florian Lang, osmosis is essentially explained as the flow of water from one area to another that are separated by a selectively permeable membrane to equalize concentrations of particles in the two locations (Lang, 1997). Osmosis is able to maintain osmotic pressure and regulate a cell's volume.
In a hypotonic () or hypertonic ()...
1,380 Words | 5 Pages
PH lab - 779 Words
Critique Dr. Honeydew’s report. Specifically, discuss what is missing and how the
missing information should have been presented.
First the PH measurements, Dr. honey dew does not explain how the PH device was calibrated or if the blood sample was added or mixed with anything prior to the measuring of the pH (like water, etc.). In regards to the absorption spectroscopy, the method by which the concentration was obtained is questionable. Was the concentration known before the...
779 Words | 3 Pages
Ph Buffer - 332 Words
Good evening class and professor!
I chose to discuss topic 2 this week. The topic is Discuss how buffers help to regulate body pH.
The pH level in the blood is maintained by the kidneys and the lungs. The pH level on the blood should be at 7.4. In order for the kidneys and lungs to maintain this pH level it affects the buffers in the blood. The buffer is a substance that is resistant to the change in the body’s pH level. Basically the buffers can make an acid or base less potent and try and...
332 Words | 1 Page
pH lab - 644 Words
pH of Household Bases and Acids
Objective: To determine if common household substance are acids, bases or neutral.
Isopropyl Alcohol 70%
Baking Soda Solution
Red Wine Vinegar
Safety and Disposal:
White cloudy solution. Strong ammonia odor. Mildly toxic by ingestion and inhalation. Irritating...
644 Words | 4 Pages
Ph Lab - 989 Words
Effects of Temperature and pH on Enzyme Function
Robin Cotter Introduction
The purpose of this experiment is to identify three unknown enzymes. This is done by
using different temperature and pH to affect the function of the enzyme, which ultimately, will
affect how much maltose is produced.
Enzymes are proteins that help catalyze chemical reactions. In enzymatic reactions, the
molecules at the beginning of the process are called substrates, and the...
989 Words | 4 Pages
Ph Paper - 1230 Words
Acids, Bases, and Buffers
The pH scale is used to determine how acidic or basic a solution is, ranging from 1-14. The most acidic of all acids are at a pH level of 1 and the most basic of all bases are at 14. The neutral pH level is 7, which is what drinking water is. The pH level is determined by the amount of H+ ions present in a solution, and the more H+ ions there are the more acidic it is, and the lack of these ions results in more basic solutions. One distinguishing...
1,230 Words | 4 Pages
PH Lab - 1633 Words
The Objective of this lab was to learn how to measure the pH (or acidity) of commonly known fluids, using the correct tools and procedures. To then use that data to document the changes noticed when mixing those same fluids and changing their respective pH levels.
In order to conduct this experiment several pieces of equipment and other materials were needed. The first item was a graduated cylinder, which was used in order to measure out the...
1,633 Words | 7 Pages
Ph Value - 1031 Words
pH plays a very important role in our lives. It is used in several applications. For example, a swimming pool must be constantly maintained by checking its pH. If the water becomes too acidic or too basic, acidic or basic chemicals must be added to the water to balance out the number of H+ ions and OH- ions.
pH also is important when it comes to the body. Whenever someone gets heartburn, stomach acid builds up and causes deep pain near the opening...
1,031 Words | 3 Pages
pH and its meaning - 451 Words
pH means Power of Hydrogen or Potential of Hydrogen.
pH is a scale of acidity from 0 to 14. It tells how acidic or alkaline a substance is. More acidic solutions have lower pH. More alkaline solutions have higher pH. Substances which are not acidic or alkaline i.e neutral usually have a pH of around 7. Acids have a pH less than 7. Alkalis have a pH greater than 7.
There are a lot of ways for finding the pH of something. One way is to use litmus paper. The pH paper is able to tell how...
451 Words | 3 Pages
Ph Scale - 484 Words
The pH Scale is a scale made to show how acidic or alkaline a substance is. The pH of something is measured with pH paper which can vary from wide range paper, which covers all ph’s, but is not as accurate at some others. There are pH papers that get very specific that can have a range such as 2 or 3 and get much more precise. The neutral on the scale is 7. Anything that is below 7 is considered acidic and anything above 7 is considered alkaline. Acidic substances contain more H+ than OH-....
484 Words | 2 Pages
pH Levels - 635 Words
Date: 17 Aug 2014
Assignment: SCI103 Phase 1 Lab Report
Title: Measuring pH Levels
Instructions: Enter the Virtual Lab, and conduct the experiments provided before going out into the virtual field for additional research. Please type your answers on this form. When your lab report is complete, submit it to the Submitted Assignments area of the Virtual Classroom.
Part I: Answer the following questions while in the Phase 1 lab environment.
635 Words | 4 Pages
Measuring Ph - 1640 Words
Date of Lab: 02/09/13
Date Report submitted: 02/26/13
Purpose of the experiment
By doing this experiment, we were trying to learn how to measure a pH with a pH meter to determine whether a solution is weakly, moderately or strongly acidic or basic; but also to compare the different data founded to see how the addition of certain liquid to a solution may affect the pH of the initial solution.
* Tap water, distilled water, Soda and milk as the main...
1,640 Words | 5 Pages
Ph Balance - 462 Words
PH is the measure of acid or alkaline in the blood in the human body. The pH level is measured on a scale from 1 to 14; 1 being the most acidic and 14 being the most alkaline. The normal blood range should be closest to the number 7.4 on the pH scale. Once the body reaches a number lower than 7 it is considered too acidic and no longer optimal and metabolism will become out of balance. Many different diseases and injuries can cause this condition.
Different forms of acidosis can occur to the...
462 Words | 2 Pages
pH and Enzymes - 1667 Words
How pH Affects the Activity of Amylase
Sara Van Natta
Biology 107, section 2, TA: Alex
The goal of this experiment was to determine how an enzymes’ pH can influence the speed of the reaction rate. The objective of this was to determine the optimum pH for a solution with an enzyme, amylase since every enzyme has an optimum pH- where it is most active. It was hypothesized that the reaction rate becomes faster...
1,667 Words | 5 Pages
Ph Lab - 1094 Words
The purposes of this lab include learning how to measure the pH of several different liquids as well as learning how to change the pH of those liquids by adding other acidic and alkaline mixtures.
Graduated cylinder- used to measure the various liquids
4 100 mL beakers- used to hold liquids when measuring pH
pH meter- used to measure the pH of the various liquids
Tap water- liquid we are trying to find pH of
Distilled water- liquid we are trying to find pH of...
1,094 Words | 4 Pages
LAB PH - 922 Words
PH at the UN
Alfredo Vidal Ceballos
Group Support Part 1:
Solution Group Name and M. cons. Chem formula Type Experimental pH
1 Deidre Acetic Acid 0.1M HC2H3O2 Weak Acid 3.03 3.03
2 Acetic Acid 1M HC2H3O2 Weak Acid 2.59 2.54
3 Hydrochloric Acid 0.5M HClStrong Base 0.85 0.90
4 Jonah Nitric Acid 0.1M HNO3 Strong Acid 2.14 2.14
5 Sodium Acetate 1M NaC2H3O2 Weak Base 9.42 9.42
6 Potassium Dihydrogen Phosphate 0.1M KH2PO4 Weak Acid 5.47 5.47
7 Andy Potassium Hydrogen Phosphate...
922 Words | 5 Pages
Acid Base PH Lab
The effect on the pH of Distilled water, Potato Solution and Commercial Buffer, when Hydrochloric acid (0.1 mol/L) and Sodium Hydroxide (0.1 mol/L) is added
September 23rd, 2014
The pH is the measurement of how acidic or how basic a substance can be. The pH scale is used to measure how acidic or basic a living cell can be. The pH scale ranges from 0-14; 0-6 being acidic, 8-14 being basic and 7 being neutral. There are many...
1,959 Words | 8 Pages
Natural pH indicator - 257 Words
Title of this experiment is the acid-base indicator from natural dyes. This experiment is to investigate the colour variation of solution extracted from pigment of vegetable and fruit skin according to pH value and to deduce the ability of the extraction to act as an indicator in titration. The problem statement of this experiment is how does the colour of solution extracted from pigment of vegetable and fruit varies according to pH value of universal indicator and can...
257 Words | 1 Page
Colorimetric Determination of Ph - 2788 Words
Date Due: July 25, 2013
Date Submitted: July 25, 2013
2,788 Words | 10 Pages
Effect of pH on Food Preservative
Chem 253- TA: Gia Hoang
Lab 1: Effect of pH on a Food Preservative
The purpose of this lab was to determine if a new substance forms when sodium benzoate is placed in a simulated stomach acid.
Benzoic acid can be found in a wide variety of plants. It is used as a natural preservative in many foods. Sodium benzoate, the salt of benzoic acid, has become a more popular choice as a food preservative because it is more soluble in water than benzoic...
489 Words | 3 Pages
Slime Mold and pH - 2068 Words
The Effects of pH on Slime Mold Dg
BIOL181 – 059
1 December 2011
The theory that slime mold is attracted to acidic solutions was examined by the slime mold, Dg. Dg’s preference of pH was examined by using a variety of pH solutions in a petri dish. The data suggests that the growth of fruiting bodies observed in pH 9 was comparable to that of pH 4.
The 2002 scientific...
2,068 Words | 9 Pages
The spetrophotometric determination of pH - 493 Words
The Spetrophotometric Determination of pH
This experiment is designed to find the pH of an unknown buffer. We find this by adding acid/base indicator of known Ka then by using a spectrophotometric measurement device to measure the absorbance of the solution. Because of an overlap difference between the spectra for acid and base forms, the molar absorptivity for each form will be measured at...
493 Words | 3 Pages
Determining the pH Level of a Substance
Lab II: Acids or Bases?
1. Acids Bases
Orange juice Windex
Vinegar Dish detergent.
2. There are multiple pros and cons for using different types of indicators to determine the Ph level of a substance. When using a paper indicator you can easily get the color of the Ph strip mixed up with another color which will affect the results of the Ph level. Also, a Ph indicator will give you one solid cold, so will a...
308 Words | 2 Pages
The Effects of Ph on Mung Beans
The effects of pH on mung beans
January 15, 1998
This experiment explores how different pH environments affect the growth of mung beans. The mung beans were grown in water with various pH levels, consisted of pH levels 5, 6, 7, 8, and 9. A replicated design was used consisting of 3 runs for each pH level. The following results are listed in order of pH levels allowing most growth to least growth of the mung beans: 7, 8, 6,...
1,464 Words | 4 Pages
Ph Bean Lab - 2401 Words
October 20, 2010
IB Biology SLII
The effect of three different pH levels (4, 7, 10) on the rate of germination of spanish beans
What is the effect of three different pH levels (4, 7, 10) on the rate of germination of spanish beans?
The different pH levels in the water would be the independent variable in this lab. Three different pH levels were tested, 4, 7 and 10, both 4 and 10 were chosen because they are 3 pH levels away...
2,401 Words | 8 Pages
pH and Living Systems Lab
pH and Living Systems
I. Purpose: To observe the effects of pH change on an organic molecule.
pH paper Droppers Ammonia
Beakers (50ml) Paper towels water
Glass stirring rods lemon juice forceps
Initial pH testing
1) First use the wide range pH paper to test the pH of the liquids given.
2) When you test with the wide range paper first (which reads pH from 0-13) be...
472 Words | 2 Pages
Colorimetric Determination of pH - 1403 Words
Experiment #6: Colorimetric Determination of pH
Almira, Faerie Carleen Lucile L.
Gallardo, Charlotte O.
Group #6, Chemistry 18.1, MHEG1, Ma’am Arlou Angeles
September 23, 2013
The acidity of the four unknown solutions were determined with the use of colorimetry using McIlvaine’s buffer solutions varying in proportion of its constituents (disodium phosphate and citric acid). These buffer solutions were subjected to the addition of corresponding pH indicators and the variation...
1,403 Words | 14 Pages
Ph and Buffer Solution - 1998 Words
Title: pH and buffer solutions
This experiment was carried out to determine the role of buffer solution and the factor which affect the buffer capacity. Besides, this experiment was carried out to investigate the solubility of protein casein over a range of pH concentration. This experiment also was carried out to determine the isoelectric point of the casein and the effect of the isoelectric point toward the casein solution.
Verification of the Henderson-Hasselbalch equation...
1,998 Words | 7 Pages
effect of pH on amylase activity
Biology Lab Report
Effects of pH on amylase activity
Amylase is an enzyme that is in human’s saliva as well as the pancreas. Enzymes are biological catalysts that speed up a chemical reaction. They break down complex molecules into simple ones. In this case, amylase converts starches (complex molecule) into simple sugars. That is why foods like potatoes for example, may taste sweet to us, because they contain starch. The optimum pH for...
1,065 Words | 14 Pages
Effect of pH on Protein Digestion
Objective: To investigate how pH affects the rate of protein digestion
Hypothesis: I predict that since pepsin breaks down the material the quickest at a pH of 2 in the stomach, test tubes #3 will reduce the greatest because it has pepsin to further break down the egg. Whereas the other test tubes will have a smaller reduction. I think test tube #2 will have the second largest reduction rate and then #6 because they all will have a greater rate at breaking down the material, Then, I predict the...
509 Words | 5 Pages
Introduction to pH Scale - 314 Words
In a world of such various differences, human beings since the beginning of time have wanted to find ways to discover what makes said differences, different. Hot vs. cold, soft vs. hard, acid vs. base. For each of the named, we have methods of gauging the difference between one another, and the severity of said difference. For heat we have temperature, for hardness we have scales such as the Rockwell scale, and for acidity or basicness, we have the pH scale. Common examples of acids include...
314 Words | 1 Page
Ph Buffer Lab - 542 Words
Scientific method is a systematic observation, measurement and experiment. It is the formulation and testing of a hypothesis. When analyzing pH it measures for the acidity or basicity of a solution. pH levels vary depending on the solution. The more acidic solutions would be juices and vinegar and cleaning materials would be basic. You can determine the purpose of solutions based on their acidity and basicity. We measure the pH of solutions on a scale with levels from 1-14. These...
542 Words | 2 Pages
Soil pH Measurement - 609 Words
Experiment 3: Soil pH measurement
The aims of the experiment were to determine the pH of a variety of soils which included sedentary, 3:2, sand, organic matter with the means of a pH meter at various soil water ratios and with or without calcium chloride.
Method and Materials
Samples of sedentary soil, 3:2 soil, sand, organic matter and compost, 100ml vials(x12), bottle of distilled water, analytical balance, pH meter, 2 buffer solution of known pH, 0.25M calcium...
609 Words | 2 Pages
Ph Effect Slaters - 2326 Words
Armadillium vulgare taxis response to different pH levels.
The terrestrial isopod, Armadillium vulgare is commonly referred to as a slater or pill bug. Since transitioning from the sea to land and originally colonizing in Mediterranean regions, it has adapted throughout evolution to inhabit local microhabitats. The pill bug is bound by several parameters and also has specific requirements that need to be met for optimal biological functioning. As such, behavioural and...
2,326 Words | 8 Pages
Effects Of PH On The Function Of Enzyme
Effects of pH on the Function of Enzymes
Glen Rock High School
Effects of pH on the Function of Catalase
Problem: How does the pH of a cell affect the function of the enzyme catalase?
In this lab, we experimented the effects of pH on the function of the enzyme catalase. Catalase is an enzyme that brings about the reaction by which hydrogen peroxide is decomposed to water and oxygen (Encyclopedia...
1,489 Words | 6 Pages
pH Levels Lab - 1412 Words
Lab on pH Levels
Throughout this experiment we are trying to learn how to take proper pH measurements using a pH meter. We also want to see the pH of different common liquids and record the change in pH when we add acids and alkaline liquids. The last reason we are conducting this experiment is to explain and show how fresh milk spoils by the change in pH.
In this experiment we used graduated cylinders and glass beakers and added variety of ingredients including 50 mL of;...
1,412 Words | 4 Pages
Ph Balance in Human Body
Bandaruk Mon-Wed 12:45
PH Balance in the Human Body
As we all know every solution is either acid or alkaline. Alkaline is often called base. These solutions can be anything from body fluids, to fruits, vegetables, seawater, beverages you name it. Acid and alkaline is measured in pH. It starts as low as zero being very acidic and works its way up to fourteen being the most basic. The pH of our stomach is 2, obviously to digest food, wine is 3.5,water is 7(neutral),...
652 Words | 2 Pages
Lab 1 on Ph Levels
Name: Reba Smith
Date: May 27,2013
Instructor’s Name: Sylvia Nemmers
Assignment: SCI103 Phase 1 Lab Report
Title: Measuring pH Levels
Instructions: Enter the Virtual Lab, and conduct the experiments provided before going out into the field for additional research. Please type your answers. When your lab report is complete, submit it to the Submitted Assignments area of the Virtual Classroom.
Part I: Answer the following questions while in the Phase 1 lab environment.
521 Words | 3 Pages
Ph and Buffers Lab - 1819 Words
Buffers, and pH, and Diffusion oh my
The pH of a solution is the measure of the concentration of charged Hydrogen ions in that given solution. A solution with a pH lower than seven is considered to be acidic. A solution with a higher pH is a base. It is very important for organisms to maintain a stable pH. Biological molecules such as proteins function only at a certain pH level and any changes in pH can result in them not functioning properly. To maintain these constant pH levels, buffer...
1,819 Words | 6 Pages
Enzyme and Ph Lab Report
pH & Enzyme Action
Aim: To inspect the effects of the pH on enzymes.
100 cm³ Beaker
3 – 5cm³ Syringes
2 Test Tube Racks with 8 Test Tubes
Dropping bottle of detergent
400cm³ Hydrogen Peroxide
200cm³ Liver Catalase Solution
100cm³ of following Buffer Solution – pH5 pH7 pH9 pH11
The materials were collected. The test tube rack one with 4 test tubes had been labelled A to D. The 2cm³ of each buffer...
334 Words | 2 Pages
Ph Effects on Catecholase Activity
Lab #6: pH Effects and Enzyme Concentration on Catecholase Activity
This experiment examined the effect on how the changes in pH balance of potato juice affected the enzyme activity, structural stability and solubility.
Enzymes are macromolecules that allow chemical reactions to occur. They function as biological catalysts. A catalyst is a substance that is involved in, but not changed by or consumed in, a chemical reaction. The amount of energy required for a...
516 Words | 2 Pages
pH and Microbial Growth - 279 Words
pH and Microbial Growth
Each organism has an optimum environment for growth, which includes pH level. Organisms that grow at near neutral pH levels are called neutrophiles. Those that grow best in acidic pH values are called acidophiles. Others, yet, grow best in alkaline pH values and are called alkaliphiles.
In this lab, each group was assigned an organism, which was then used to inoculate 6 different pH levels.
Materials and Methods:
Followed lab procedure 29, “pH...
279 Words | 1 Page
Investigating the Properties of Ph - 649 Words
Investigating the Properties of pH
The manufacture’s claim is that Sensodyne toothpaste micro hardens tooth enamel to help protect against the effects of acid wear, helps stop the twinges of pain from sensitive teeth formulated with low abrasivity, neutral pH and gentle yet effective cleaning system.
To find out if the manufactures claim on Sensodyne toothpaste is the correct level of pH.
I expect the Sensodyne toothpaste to be a neutral pH level as the manufactures claim that this...
649 Words | 3 Pages
Ph Lab Report - 1695 Words
The different methods of measuring acids and bases in a solution
Intro to Biology
September 26, 2011
Lab Partners: Kristen, Tania and Betty
When using different methods to measure pH levels there are some tools that can be useful. Some more than others but by putting into action the different methods it may determine which tools will work best and...
1,695 Words | 8 Pages
The Effects of Ph in Beano - 466 Words
The Effects of pH in Beano
The enzyme my experiment was conducted from was Beano. Beano is a dietary supplement which is used to reduce gas in the digestive system and is enzyme based. The question that my group was trying to answer is “At what pH is Beano most effective?” Our hypothesis was “If Beano solution is placed in the 6 pH buffer, than it will work more efficiently.”
Methods and Materials:
Two Beano tablets were grinded into a fine powder and then 10ml of water...
466 Words | 2 Pages
The Effect of Ph on the Activity of Catalase
Title : THE EFFECT OF PH ON THE ACTIVITY OF CATALASE
Aim : To study the effect of pH on the activity of catalase.
Catalase, an enzyme found in many different tissues, catalyses the breakdown of hydrogen peroxide into water and oxygen.
2 H202 → 2H20 + O2
Hydrogen peroxide is a toxic substance that can be formed during aerobic respiration and catalase removes this product. The activity of catalase can be measured by finding the rate of oxygen release from hydrogen...
1,236 Words | 4 Pages
Effect of pH on Invertase Activity
EFFECT OF pH LEVEL ON THE ENZYME ACTIVITY OF INVERTASE
John Dale Cruz, Michael Ray Dela Cruz, Karen Angelica Domalaon, Abegail Dulay, Shirley Ann Felipe
Group 5 2C Medical Technology Biochemistry Laboratory
Invertase is a type of enzyme, a natural catalytic agent for biochemical reactions, can be obtained in Baker’s Yeast. Determination of the effect of pH on invertase activity is the primary objective of the experiment. Dinitrosalicyclic acid (DNS) Assay method is utilized to...
1,172 Words | 7 Pages
Indicators and Ph Measurements - 434 Words
Indicators and pH Measurements
Author Name: Klein
Partner’s Names: Peiman
Instructor: Dharinee Doobur-Choytun
Vancouver Community College
Chemistry 0983 Section 433
Date: November 15, 2012
Due Date: November 22, 2012
Using our basic learning’s about Indicators and pH measurements, we will use our Universal Indicator and our pH Meter. By using these materials, we will experiment on how it will...
434 Words | 2 Pages
Affect of Ph on Enzymes - 835 Words
Access to nursing
Effects of pH on enzyme activity
The aim of the experiment is to see the enzyme amylase catalyse starch in a chemical reaction.
Enzymes are proteins. They act as catalysts, allowing chemical reactions to take...
835 Words | 4 Pages
Soil Ph of Winthrop - 865 Words
Winthrop University’s Successional
Plot’s Soil P.H.
September 30, 2011
The question of this study pertained to the amount of vegetation that was occurring on each of the succession plot’s ground floor. There are three successional plots in Winthrop University’s wooded areas, the oldest was created in 1989 the second was created in 1994 and the youngest plot was created in 1999. For the hypothesis to be tested, there were soil PH meters to...
865 Words | 3 Pages
7.03 Lab Ph - 790 Words
Part I: Titration with an Indicator
1. Fill the 50-milliliter buret with a 0.25 molar NaOH solution.
2. Record volume.
3. Measure out between 20 milliliters and 40 milliliters of the unknown HCl solution.
4. Record volume.
5. The amount of unknown HCl is then added to the 100-milliliter Erlenmeyer flask.
6. Add two drops of the indicator, phenolphthalein, to the acid in the flask.
7. Using the slider on the right hand side, add NaOH to the HCl in the Erlenmeyer flask (This...
790 Words | 3 Pages
Ph Levels Lab Report
The relatively close pH levels of Tap Water, Spring Water,
Flavored Water, and Seltzer Water.
This experiment was performed to investigate the following hypothesis: The following four different types of drinking water (spring water, seltzer water, tap water, and flavored water) we test will relatively have the same pH level.
Our group decided to test different types of drinking water to see if a pH level of tap water is comparable to other types of water. Many people...
881 Words | 3 Pages
pH Lab Report - 617 Words
The purpose of this laboratory is three fold:
1. Familiarize the student with the concept and meaning of pH
2. Provide the student experience in measuring pH
a. pH testing paper
3. Test the student’s hypothesis as it related to the pH of common solutions
The pH of the tested solutions will be in the order of the following according to a pH scale:
1. Lime juice
2. Orange juice
4. Iced Tea
617 Words | 4 Pages
Affects of Ph on Peroxidase Enzyme
The Affects of pH on Peroxidase Enzyme
Peroxidase is a turnip enzyme; it is used in the oxidation of hydrogen peroxide to lower activation energy, speeding up the reaction. The activity of peroxidase is highly dependent on its environment and most importantly the pH level. Peroxidase has been the focus of many recent studies and is believed to possibly reduce swelling among other things. We...
1,598 Words | 5 Pages
The Affects of Ph and Pepsin with Proteins
Background: Pepsinogen is an inactive protein that is the mucus lining of the stomach. When converted to pepsin, the enzyme is used to break down large or undigested protein they has been absorbed by the small intestine. The digestive power of pepsin is greatest at the acidity of normal gastric juice (pH 1.5–2.5). In the intestine the gastric acids are neutralized (pH 7), and pepsin is no longer effective.
"Pepsin (biochemistry)." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d....
719 Words | 4 Pages
Investigation on the effect of pH on enzymes
How does pH of potatoes affect the breakdown of starch by the enzyme Salivary Amylase?
Enzymes are proteins that are found inside our bodies and their roles are to break down large molecules into smaller soluble ones. Enzymes are found in different parts of our bodies and each of them breaks down a specific type of substrate at specific conditions. These conditions include pH and temperature. Our internal body temperature is around 37°C and this is the optimum...
1,785 Words | 6 Pages
The Effect of Soil Ph on the Living Conditions
The Effect of Soil pH on the Living Conditions
In Lumbricus terrestris
The difference in soil pH weighs a heavy measure on the appearance of the earthworm Lumbricus terrestris in different areas of soil. A highly acidic or highly alkaline soil may be the underlying reason for the absence of this earthworm in certain areas where pH plays a large role. In this experiment, soil pH was altered with Miracida soil acidifier and Agricultural Limestonea soil correctional for acidic...
2,585 Words | 8 Pages
Biology Experiment: Effects of pH on Enzymes
Effects of pH on Enzymes
AIM: To investigate the effect of pH on the enzyme catalase.
THEORY: The enzyme in potato is called catalase. Catalase is also produced by the body to breakdown hydrogen peroxide(H2O2). Catalase present in all body organs being especially concentrated in the liver and erythrocytes (red blood cells). The brain, heart, skeletal muscle contains only low amounts. H2O2 is common by-product of metabolic reactions. In high concentration it is toxic;...
355 Words | 2 Pages
“The Effect of pH levels on Reaction Rates”
The catalysis of enzymes within our bodies is essential for human survival and when this ability is impaired by the presence of Hydrogen ions, our cells cannot function properly. This experiment was conducted to determine if the reaction rate changes in response to a variation of acidic, neutral, and basic solutions. The experimental results indicated that the basic/high pH solution has a faster rate of reaction in the solution.
Enzymes are proteins that catalyze...
905 Words | 3 Pages
Analysis of Acids, Bases, Ph and Salt
Lab Report 1
Analysis of Acids, Bases, pH and Salt
Explore various methods for determining the characteristics of acid/base solution. The goal of this experiment include the investigation of various acid/base indicators, calculating the change of pH with concentration, change of pH due to the addition of salt and different between strong and weak acids/bases.
Safety and Disposal:
Use extreme caution when handling concentrated acids and bases. Dispose of...
696 Words | 4 Pages
The Effects of Temperature and Ph on Enzymatic Activity
Title: The Effects of Temperature and pH on Enzymatic Activity
Course: Bio 120
An enzyme is a molecule that is a biological catalyst for chemical reactions in the body. Most are in the category of proteins, however a few molecules called ribozymes can also catalyze reactions. Enzymes use a specific reactant called substrates to produce products. Without the use of enzymes most of the biological reactions would occur at too slow a pace to sustain the life of a cell and the organism....
475 Words | 2 Pages
A PH Meter Is An Electronic Device Used
A pH meter is an electronic device used for measuring the pH (acidity or alkalinity) of a liquid (though special probes are sometimes used to measure the pH of semi-solid substances). A typical pH meter consists of a special measuring probe (a glass electrode) connected to an electronic meter that measures and displays the pH reading.
A colorimeter is a device used in colorimetry. In scientific fields the word generally refers to the device that measures the absorbance of particular...
467 Words | 2 Pages
Food Microbiology Ph Lab Report
Determining pH Using a Red Cabbage
April 22, 2011
Purpose: To test the pH level of many common household object by use of the juice from a red cabbage.
Background: pH is the measure of the acidity or basicity of a solution. The pH scale ranges from 1 to 14 with 1 through 6 being acidic and 8 through 14 being basic; 7 is considered neutral. The use of the red cabbage, or red cabbage juice is because red cabbage can be used as an acid/base...
511 Words | 3 Pages
Effect of pH ona food preservative
September 10th, 2013
LEARNING BASIC OPERATIONS:
THE EFFECT OF PH ON A FOOD PRESERVATIVE
The purpose of this experiment was to investigate a competitor’s claim that the food preservative, sodium benzoate (C6H5COONa), made by Fresh Foods International (FFI), changed into a new substance in stomach acid. Stomach acid has a pH between 1 and 3 due to the hydrochloric acid content. Based on the net equation given in the book as well as the solubility of the product our...
683 Words | 3 Pages
The Effects of Ph and Concentration Levels on Catecholase
This lab was performed in order to discover the activity of the enzyme catecholase in different pH levels as well as its absorbance in differently concentrated solutions. A spetrophotometer was used to measure the absorbance of the enzyme catecholase in different pH solutions as well as to measure the absorbance of catecholase in solutions with different concentrations of potato juice and phosphate buffers. Absorbance of the enzyme catecholase was at an optimum level when pH was...
1,267 Words | 5 Pages
The Effect of Dissolved Carbon Dioxide on Ph
Aim: To demonstrate dissolved carbon dioxide changing the ph level of substances.
* 2 beakers
* 2 straws
* Stop watch
* Distilled water
* Lime water
* Litmus Paper
1. Pour 100ml of Distilled water into the first beaker, and label said beaker.
2. Pour 100ml of Lime water into the second, also Label beaker.
3. Test the two liquids with litmus paper and note the ph level, before any carbon dioxide has been introduced.
4. Place a...
415 Words | 2 Pages
Effect of Ph on Green Pea Germination
Effect of pH on Green Pea Germination
To determine how pH affects the germination of green peas and to examine the degree of germination within each pH level. We will do this by using various buffer solutions (along with distilled water) to grow green peas.
We expected that the group of peas that encountered a pH of 7 to have the most and highest degree of germination.
buffer solutions pH 3,5, 7, 9,11...
538 Words | 4 Pages
Red Cabbage Juice Ph Indicator
Red Cabbage Juice pH Indicator
Sources: Prof. George Ewing's C100 Demonstration Notes; Prof. Carolyn Huffman's Fall '93 C100 lecture; B. Z. Shakhashiri, 1989, Chemical Demonstrations: A Handbook for Teachers of Chemistry, vol. 3, pp 162-166.
Description and Concept: Red cabbage juice will change to a variety of colors when added to solutions of various pH. Red cabbage juice is a pH indicator.
hot or boiling water
filter paper (coffee...
772 Words | 3 Pages
Digestion of Carbohydrates in Relation to Ph. Levels
Digestive System Enzymes
Digestion of Carbohydrates in relation to Ph. levels
Digestive System Enzymes
Digestion of Carbohydrates in relation to Ph. levels
The follow experiment was prepared, conducted and analysed in order to test at which pH level starch will be digested at fastest. The digestive system is a complex network of organs as well as other...
2,550 Words | 10 Pages
Effect of carbon dioxide on the pH of water
Title: Effect of dissolved Carbon Dioxide on the pH of Water
Aim: To investigate the effect of dissolved carbon dioxide on the pH of water.
Hypothesis: The dissolved carbon dioxide will cause the water to turn acid, lowering the pH when carbon dioxide dissolves in water in which it forms carbonic acid (H2CO3).
Materials: Straws, distilled water, safety glasses, pH probe, computer, universal indicator, gloves, lab coats, measuring cylinder, data...
644 Words | 3 Pages
The Effects of Varying Ph on Enzyme Activity
The Effects of Varying pH on Enzyme Activity
A lab was conducted to test different pH balances on an enzyme.
Enzymes are protein catalysts that speed up a chemical reaction without being consumed in the process. Enzymes are three-dimensional structures that consist of one or more polypeptide chains. The polypeptide chains form an active site (where a substrate will fit into). Enzyme molecules are folded into a very specific shape held together by the different forces of...
490 Words | 2 Pages
Measuring the pH of Common Household Substances
CAT - Measuring the pH of common household substances
1. Predict the pH value of substances & estimate the pH value by using the universal indicator.
2. Use the indicator to identify acidic, basic, and neutral substances found in any home
3. Classify household items as acids and bases
4. Collect organise and analyse results in tables and graphs (if necessary)
5. Analyse results and explain the reason the substances have the pH obtained.
Aim – To use a...
1,237 Words | 5 Pages
Effect of Ph Level on Corrosion Rate
THE EFFECT OF pH LEVEL ON CORROSION RATE
Long Laboratory Report
The Department of Chemical Engineering...
2,036 Words | 8 Pages
Natural and Common pH indicators experiment
An indicator is a halochromic chemical compound that is added to a solution to determine its pH. It is a chemical detector for hydronium ions. The indicator changes colour to show the pH of the solution. Some indicates are not very precise and only tell us whether the solution is acidic or basic. When the indicator is added to the solution, they bind to hydrogen or hydroxide ions. The different electron configurations of the bound indicator cause the indicator's colour to change....
946 Words | 5 Pages
Effects of Ph on Fungal Amylase Activity
Effects of pH on fungal amylase activity
November 25, 2011
In recent years, the uses of microorganisms have become a huge importance to industry and sparked a large interest into the exploration of enzyme activity in microorganisms. Amylase is one of the most widely used enzyme required for the preparation of fermented foods. Apart from food and starch industries, in which demand for them is increasing continuously, amylase is also used in...
1,625 Words | 6 Pages
Effects Of Hyperventilation On CO2 And PH Levels
Effects of hyperventilation on CO2 and pH levels
Physiology Lab 142
Aprill 25, 2014
The aim of this experiment was to analyze how pH and carbon dioxide (CO2) levels in the blood change during hyperventilation and how the renal system compensates for this condition. Hyperventilation decreases CO2, increases pH, and lowers H+ levels which then results to respiratory alkalosis. In the experiment, we used the PhysioEx 8.0 software to simulate...
1,084 Words | 4 Pages
The Effect of pH on Enzymatic Reaction Rate
The Effect of pH on Enzymatic Reaction Rate
Enzymes are affected by changes in pH. The most favorable pH value— the point where the enzyme is most active—is known as the optimum pH. This experiment was conducted to determine the effect of pH reaction rate on an enzyme, catalase, from yeast. The experimental results indicate that the catalase worked best at a neutral pH level of seven (7).
An enzyme is a protein molecule that serves as a catalyst. “The basic...
1,250 Words | 5 Pages
Lab1: Effect of Ph on Food Preservatives
Lab 1: Effect of pH on sodium benzoate, a food preservative
Sheikh M Zakaria
Person no. 36295651
TA: Synthia Gratia
Date of Submission: 05/29/13
Sodium Benzoate is a common food preservative used in food products such as jams and jellies, soft drinks, pickles, condiments etc and in tinned products in the market. This experiment aimed to determine whether benzoic acid is formed from it’s superior soluble form sodium benzoate in stomach acid, which is simulated by HCl (pH=2). It...
1,347 Words | 5 Pages
How does ph affect enzyme reactivity
Observing Enzyme Activity
Purpose: The purpose of this experiment was to test whether the pH affected the enzyme reaction rate.
Hypothesis: If the enzyme is in a basic solution, then it will react faster because the enzyme (catalase) reacts better in basic solutions.
10 potato cubes (1 cm3) -Pipet
Baking soda solution -50 ml glass beaker
5 glass test tubes
608 Words | 3 Pages
An Investigationinto the Effect of Ph on the Activity of Potato Tissue Catalase
An Investigation Into The Effect Of PH On The Activity Of Potato Tissue Catalase
The aim of my investigation is to see how pH affects the activity of potato tissue catalase, during the decomposition of hydrogen peroxide to produce water and oxygen.
Catalase + 2H2O2 Catalase + 2H2O +O2
Catalase + Hydrogen Peroxide Catalase + Water + Oxygen
The independent variable in this investigation is pH. Each individual enzyme has it’s own...
1,537 Words | 5 Pages
Design and preparation of buffers effective at different pHs
Experiment 1 : Design and preparation of buffers effective at different pHs
The body uses natural buffers to maintain the many different pH environments in our body. This is important for optimum activity of our enzymes. When doing experiments in vitro using these enzymes it is important to mimic intracellular conditions using artificial buffer systems in order to obtain accurate results. In this experiment the buffering properties of three artificial buffer systems containing...
1,605 Words | 12 Pages
The Effect of Concentration, Ph and Temperature on Enzyme Activity
The Effect of Concentration, pH and Temperature on Enzyme Activity
Biology For Majors
October 4, 2012
We examined the reaction an enzyme has when its concentration, pH and temperature are altered. In order to do this, we added different levels of pH into different test tubes with the enzyme (sucrose), and substrate (sucrose), and we then inverted the tube. The higher pH produced more enzyme activity. Temperature effects enzyme activity by decreasing its stability when the...
2,011 Words | 7 Pages
Phosphorus in Soil: Plant Nutrients and Soil pH
Figure 1. Nutrient availability and microbial activity as affected by soil pH; the wider the band, the greater the availability or activity. (Adapted from Truog, USDA Yearbook of Agriculture 1943-1047)
Rosen, C. et al. Soil pH Modification. 2004. Soil Test Interpretations and Fertilizer Management for Lawns, Turf, Gardens, and Landscape Plants.http://extension.umn.edu/distribution/horticulture/components/1731-03.html. University of Minnesota. (accessed January 15, 2008).
621 Words | 2 Pages
Investigation on Effects of DOPA pH on Enzyme Activity
Investigation on Effects of Different pH on Enzyme Activity
How does the different pH buffers affect activity of potato enzyme/extract?
Proteins are polymers that are made up of smaller units/monomers called amino acids.
There are 20 different types of amino acids, thus make up many different combinations in
types, numbers of amino acids as well as their orders – an explanantion for why there are so
many proteins. Every protein, due to various reactions of amino acids to...
1,225 Words | 6 Pages
How the pH scale affects the Denaturing of Enzymes
Purpose: The purpose of this lab was to test how objects slightly acidic or slightly basic will affect the way catalase, the enzyme tested, denatures, or breaks down.
Hypothesis: If the potato is acidic, it will react with the H2O2 more than it will with the raw, plain potato because the acid will denature the enzyme faster.
The manipulated/independent variable is the raw, plain potato while the responding/dependent variable is the other types of potatoes used in the experiment....
450 Words | 2 Pages
Chemistry Project: Acids and Bases & the pH Scale
Acids and Bases are two groups of chemical compounds that generally have opposite
characteristics. They have there own unique traits, acids taste sour, turn litmus red while
bases taste bitter and turn litmus blue. The term pH relates to measuring the acidity or
alkalinity of a solution, such as vinegar, or even a damp substance like soul.
The neutral pH is 7, which is essentially water, with lower numbers indicating acidity and
higher numbers indicating alkalinity. Hydronium ions (H3O+)...
1,517 Words | 11 Pages
Finding the Optimal pH of the Enzyme Peroxidase with the Aid of a Spectrophotometer
Finding the Optimal pH of the Enzyme Peroxidase
with the Aid of a Spectrophotometer
The peroxidase enzyme was partially purified, and the enzyme activity was calculated with the use of a spectrophotometer, demonstrating the effect of pH on peroxidase activity. The objective of this exercise was to determine the ideal pH for peroxidase activity. The data concluded that the optimum pH for peroxidase activity is 5, and the...
723 Words | 6 Pages
Biology 111 Ph Lab Report Discussion
Since chemical reactions that occur within a cell occur at too slow of a rate to support life, there needs to be an enzyme present to help this reaction occur quicker. Any factors that affect the enzyme activity increase the reaction to its optimal level then begin to decrease due to denaturation. In this experiment, the factor that affected the enzyme activity was pH. Since the cause of denaturation is either the removal or addition of hydrogen ions, (Freeman, et al., 2011),...
837 Words | 2 Pages
Affect of pH on Porcine Pancreatic Alpha-Amylase Activity
Affect of pH on Porcine Pancreatic Alpha-Amylase Activity
Proteins function in a variety of different ways, and one of their fundamental tasks is to
act as enzymes. Enzymes are extremely important in controlling reaction speed (by initiating and
regulating biological activity), cell communication, and growth. One particularly significant
enzyme is amylase, which catalyzes the hydrolysis of alpha glycosidic linkages of amylose,
starch components, and other oligosaccharides...
1,424 Words | 7 Pages
The Effect of Temperature and Ph on Α-Amylase Enzyme Activity
Starch is composed of α-amylose and amylopectin. The structure of α-amylose consists of long polymer chains of glucose units connected by an α (1-4) linkage. Amylopectin consists mainly of α (1-4) linked glucose residues but is a branched molecule with α (1-6) branch points every 24 to 30 glucose residues on average. As a result of the bond angles in the α (1-4) linkage, amylose actually forms a spiral much like a coiled spring. Amylose is responsible for the formation of a deep...
1,379 Words | 5 Pages
Testing the Ph of Common Household Substances Lab
Testing the pH of Common Household Substances Lab
The pH scale is used to determine the acidity or basicity level of liquid solutions. If a solution scores a pH level of 1-6 it is an acidic solution, 1 being the most acidic and 6 being the least acidic. If a solution rates a pH level of 7 it is a neutral solution, meaning it is neither an acidic nor a basic solution. Lastly, if a solution is 8-14 on the pH scale it is a basic solution, 8 being the least basic and 14...
1,249 Words | 5 Pages
PH Of Orange Juice Lab Write Up
Matt Chase 3A
Finding the PH of different concentrations of orange juice.
By diluting concentrated orange juice with water, can you significantly change the PH value?
Across the world, it is thought and widely accepted to believe that Orange juice is the cure to many terrible diseases. However, this may not be true anymore. It has been said that Oranges are very high in vitamin C, therefore one should drink it every...
1,531 Words | 8 Pages
Investigating the Effect of Ph on the Activity of the Enzyme Catalase.
Investigating the effect of pH on the activity of the enzyme catalase.
Hydrogen peroxide (H2O2) is a very pale blue liquid which appears colourless in a dilute solution, slightly more viscous than water. It is a weak acid. It has strong oxidizing properties and is therefore a powerful bleaching agent that is mostly used for bleaching paper.
Catalase is a common enzyme found in all living organisms. Its functions include the conversion of Hydrogen Peroxide, a powerful...
4,151 Words | 14 Pages
Understanding How Catalase Activity Is Affected by pH
Understanding how catalase activity is affected by pH is the purpose of this experiment.
Enzymes play an important role in daily life because of the chemical reactions. Almost chemical reactions require the presence of enzymes to promote the metabolic process. They are known as the incredibly efficient and highly specific biological catalysts. Most enzymes are protein with the ability to enhance the rate of reaction between molecules. To catalyze a reaction, the...
605 Words | 3 Pages
Are Common Household Products pH Balanced and Neutral?
ACIDS, BASES, & NEUTRALS
September 20, 2010
Acids, Bases, and Neutrals
Are common house-hold products pHs balanced and neutral?
pH measures how acidic or alkaline a solution is. Its concept was introduced in 1909 by biochemist Soren Sorensen. The scale ranges from 0-14. Solutions that range from 0 to 6 are considered to be Acidic. Solution that’s on the Acidic end of the scale is low in ph, high in hydrogen ion, and low in hydroxyl ions....
685 Words | 4 Pages
Chapter 2 of Experiment about PH indicators
Chapter 2: Review of Related Literature
Our independent variable in this study is the materials that will be tested while our dependent variable is the color of the product.
1. According to Rhodium (2008), “The cheapest pH-meter will cost $50 and most will go for over $100. PH paper is cheaper. But you really don’t have to use them both.”
2. According to Anne (2013), “Some fruits and vegetables contain special type of chemical so it is very convenient to use.”
3. According to...
576 Words | 2 Pages