Chemistry - 425 Words
Chemistry and its relevance
Chemistry is a branch of science deeply rooted into history. It has been studied for many years, but for an elongated period, informally and without much intent. Chemistry is defined as, “the branch of science that deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact, combine, and change…” ("Definition of...
425 Words | 2 Pages
chemistry - 1050 Words
MINISTRY OF EDUCATION
MASALA SECONDARY SCHOOL BOARD MOCK EXAMINATION 2014
PAPER 3 (CHEMISTRY) 1hour 15minutes
Additional materials: Monday 30th July 2014.
INSTRUCTIONS TO CANDIDATES
Write your name, centre number and candidate number at the top of this page all separate
Attempt all questions in SECTION A and only TWO questions in SECTION B
SECTION A (45 marks)...
1,050 Words | 7 Pages
chemistry - 3044 Words
Lovely Professional University, Punjab
Tutorials Practicals Credits
Courses with numerical and conceptual focus
Colin Baird, Michael Cann 4th
W.H. Freeman and company
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chemistry - 393 Words
Source: Chemistry by C. Mortimer
Chemistry by R.S. de Borja
Definition of Chemistry
Chemistry is concerned with the composition and the structure of substances and with the forces that hold this structure together.
And the changes that undergoes with the energy involved in them.
Chemistry which emerged, took hundreds of years to develop the history of its development can be divided ranging...
393 Words | 2 Pages
All Chemistry Essays
Chemistry - 2008 Words
Studying Chemistry at UCL
UNDERSTANDING THE PAST CHALLENGING THE PRESENT SHAPING THE FUTURE
Why UCL, why UCL Chemistry, why London? Course Structure
What you’ll do; timetable; assessment From being taught to deep learning
UNDERSTANDING THE PAST CHALLENGING THE PRESENT SHAPING THE FUTURE
Oldest university (1826) outside Oxbridge in England First inclusive UK university
Founded on principle of educating anyone who would benefit Non-CofE,...
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Chemistry - 677 Words
CHAPTER # 1
A. Chemistry, a branch of physical science, is the study of the composition, properties and behavior of matter. Chemistry is concerned with atoms and their interactions with other atoms, and particularly with the properties of chemical bonds. Chemistry is also concerned with the interactions between atoms and various forms of energy
Q.DEFINE THE BRANCHES OF CHEMISTRY.
* Physical chemistry is the study of macroscopic, atomic, subatomic, and particulate...
677 Words | 3 Pages
Chemistry - 1009 Words
Unit 1 – Lesson 1
Chemistry Key Questions
# Of Electrons
# Of Protons
# Of Neutrons
23 11 Na
2. Fireworks; Which metals burn to produce these colours?
Red – Lithium (Sr)
Blue – Cesium (Cs)
Pink – Potassium (K)
Yellow/Green – Copper (Cu)
Orange – Carbon (Ca)
3. Let’s say that the three bottles contain Fe(NO3)3, BaCl, and AgNO3. These are Iron (III) Nitrate, Barium...
1,009 Words | 5 Pages
Chemistry - 870 Words
Chemistry (the etymology of the word has been much disputed) is the science of matter and the changes it undergoes. The science of matter is also addressed by physics, but while physics takes a more general and fundamental approach, chemistry is more specialized, being concerned with the composition, behavior (or reaction), structure, and properties of matter, as well as the changes it undergoes during chemical reactions. It is a physical science which studies...
870 Words | 4 Pages
chemistry - 670 Words
By adding HCl to 2-methyl-2-butanol, through the Sn1 mechanism, 2-chloro-2-methylbutane is formed. Water, sodium bicarbonate and NaCl(aq) were then added to the 2-chloro-2-methylbutane to remove any of the excess water from the reaction. To confirm, a successful reaction, AgNO3 was added to the 2-chloro-2-methylbutane. A white precipitate formation confirmed a successful Sn1 reaction.
Nucleophilic substitution reactions such as Sn1 and Sn2 allow us to convert one...
670 Words | 3 Pages
Chemistry - 1204 Words
* a science that dealing with the structure, composition and properties of items and with the transformations that they undergo
* the composition and chemical properties of a substance
* chemical processes and phenomena (as of an organism)
- Digestion; enzymes promoting chemical reactions that power our bodies. Lifting your arm requires your body to make and burn ATP using oxygen with carbon dioxide as one of the waste gases produced.
- The internal...
1,204 Words | 6 Pages
Chemistry - 404 Words
Importance of chemistry :
1. Chemistry can improve the conditions of human life and even save lives.
2. Provides deeper knowledge.
* Plastics that are as strong as metals but light weight.
* Personal care and household products
* Polymers or various sizes and shapes
* Metal alloys
* Drugs from various ailment
CONTRIBUTION OF CHEMISTRY :
1. Food and agriculture
2. energy production
3 . environment preservation
4 . education
5 . clothing
6. colors and...
404 Words | 3 Pages
Chemistry - 384 Words
Explanation of the Multistep Synthesis of Benzilic Acid
The synthesis of several complex organic compounds follows a multistep synthesis. "Multistep synthesis" refers to the procedure in which the product of one reaction serves as the starting material in the subsequent reaction. The multistep synthesis of benzilic acid begins with a conversion benzaldehyde to benzoin through a condensation reaction. The benzoin then oxidizes into benzil, which undergoes rearrangement to give benzilic acid....
384 Words | 2 Pages
Chemistry - 470 Words
There are several chemical reactions taking place in the general baking of cakes.
Every ingredient has its own function and causes a different reaction
* Egg yolks (modify molecule’s structure) helps the oil-based and water-based components of the cake mix together. When eggs are cooked, the protein molecules become uncurled when exposed to heat and create new molecular bonds with other nearby protein molecules. When the egg is completely cooked, it helps form a...
470 Words | 2 Pages
Chemistry - 708 Words
UNIVERSITI TUNKU ABDUL RAHMAN
|Faculty |: |Faculty of Engineering & Science | |Unit Code |: |UEMK1013 |
|Course |: |Chemical Engineering | |Unit Title |: |Chemistry for Engineering |
|Year/ Semester |: |Year 1/ Trimester 1 | |Lecturer |: |Dr. Loh Han Chern...
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Chemistry - 2104 Words
Chemistry 42 Course Syllabus
Introductory General Chemistry
Santa Rosa Junior College
Section 5618 - Course Information
Lecture W,F 7:30 – 9:00 PM (1999 Bech), Lab W 9:00 – 12:00 PM (1948 Bech)
Instructor of Record: Dr. Valeria Martinovic
My office is in 1914 Bech. My Spring office hours are Mondays 10:00-10:30 PM, Wednesdays 7:00-7:30am, 9:00-10:30am, Fridays 7:00-7:30am. Leave a message at any time by e-mail at [email protected]
2,104 Words | 8 Pages
Chemistry - 46846 Words
Larick E. Mahinay
III – Perseverance
Ms. Cristina C. Areglo
Table of contents
II. Elements and Compounds
IV. Different Phases of Matter
V. Properties of Matter
VI. Concept of Matter
I. Periodic Table
II. Electronic Configuration
III. Development of Periodic Table
IV. Chemical Symbols
i. Chemical Equation Rules in Balancing
ii. Evidences of...
46,846 Words | 135 Pages
Chemistry - 1459 Words
CHEMISTRY III : (CHEMISTRY & YOU) 1
1. The science that tackles the study of matter, its structure and the changes in
composition that matter undergoes is
a. Astrology c. Ecology
b. Chemistry d. Physics
2. When a chemist performs an experiment, the quantity that is being tested is the
a. control c. theory
b. law d. variable
3. Juan is comparing how many kilos of rice can be contained in a sack. What process is
a. counting c. measurement
1,459 Words | 5 Pages
Chemistry - 1159 Words
Chemistry Review (mid-term)
1. Use the equation for atomic mass to answer the following questions. (http://johnheilchem10.escuelacampoalegre.wikispaces.net/file/view/average+atomic+mass+calculations+-+3.pdf)
1. Argon has three naturally occurring isotopes: argon-36, argon-38, and argon-40. Based on argon’sreported atomic mass, which isotope do you think is the most abundant in nature? Explain.
2. Copper is made of two isotopes. Copper-63 is 69.17% abundant and it has a mass of 62.9296 amu....
1,159 Words | 7 Pages
Chemistry - 762 Words
Experiment 9 : The effect of substrate concentration on enzyme activity
To find out the relationship between the substrate concentration and the rate of reaction by determining the number of bubbles produce
Hydrogen peroxide (H2O2) is a by-product of biochemical metabolism. An accumulation of hydrogen peroxide can be deadly, so it has to be decomposed. One of the decomposing factors is an enzyme called Catalase. Catalase breaks hydrogen peroxide into water and oxygen.
762 Words | 3 Pages
Chemistry - 714 Words
HW - Chapter 1
1. Scientific Theory
Which is true about scientific theories?
a theory is a model that explains the underlying reasons for observations and scientific laws
a theory briefly summarizes past observations and predicts future ones
a theory is a scientific opinion with very little observations to support it
a theory is a method of learning that emphasizes reason as the way to understand the world
none of the other answers apply
714 Words | 7 Pages
Chemistry - 1812 Words
Absorbance of Light vs. Concentration of Colored Solution Introduction: Performing this lab showed the importance of light in virtual drug screening because light can be used in a variety of ways to obtain different kinds of information in research. Light can be used to determine the concentration of DNA or protein in solution, tag different objects such as cells, protein structures, or bacteria in order to determine whether there is a large amount of a certain substance, and to determine the...
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chemistry - 532 Words
Summary of chemistry lab report
The two factors which affect the yield of products in a chemical reaction is the amount of starting materials (reactants) and the percent yield of the reaction. Many experimental conditions for example temperature, and pressure can be adjusted to increase yield of the desired product, in chemical reaction, but because chemicals react according to fixed mole ratios( stoichometrically), the...
532 Words | 2 Pages
Chemistry - 1945 Words
International Journal of Chemistry
Vol. 2, No. 2; August 2010
One-pot Preparation of β–amino Carbonyl Compounds by Mannich Reaction Using MgO/ZrO2 as Effective and Reusable Catalyst
Deepak.M. Nagrik (Corresponding author) Department of Chemistry, PLIT and MS Buldana-443001, M.S., India E-mail: [email protected] D.M.Ambhore P.G.Department of Chemistry, Jijamata Mahavidyalaya Buldana-443001, M.S., India Manoj.B. Gawande (Corresponding author) Departamento de...
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Chemistry - 356 Words
Separation of a Mixture of Solids
The purpose of this lab is to familiarize ourselves with the techniques associated with separating a mixture of different solids. We will learn how the unique properties of substances can aid in this process and help us distinguish each pure substance from one another.
A. How did your proposed Procedures or flow charts at the beginning of this experiment compare to the actual...
356 Words | 2 Pages
Chemistry - 765 Words
Isotopes and average atomic mass
Isotope: element variations with different atomic mass but same atomic number
Isotopic Abundance: the relative amount in which each isotope of an element
Calculating: given 2 isotopes of an element [B: 10.01u] [B: 11.01u]
1) Given average atomic mass: 10.81u
If given percentages, you can find average atomic mass by adding each portion
2) Set variables for unknown values
Let x represent % abundance for 10/5 B
Let 1-x represent % abundance for 11/5 B...
765 Words | 3 Pages
Chemistry - 832 Words
JEET SCIENCE ACADEMY CHOWK AZAM (LAYYAH)
TIME 2.5 Hr CHEMISTRY 1st YEAR CH # 1,2,9,10 Marks: 85 G.Super . 1
Name…………………………………………...... Objective ROLL NO. ……………………………….
Q.NO.1. Encircle the correct answer? (1×17=17)
1. Atoms of which one of the follelement have independent existance: (A) Flourine (B) Krypton (C ) Oxygen (D) Nitrogen 2.18g glucose is...
832 Words | 3 Pages
Chemistry - 53810 Words
The Student’s Guide to HSC Chemistry
c Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts and no Back-Cover Texts.
Licensed for free distribution under the GFDL
The Student’s Guide to HSC Chemistry
About the Guide
The Student’s Guide to HSC Chemistry is a brand new form of...
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Cai in Chemistry - 3453 Words
COMPUTER ASSISTED INSTRUCTION IN CHEMISTRY IN RELATION TO LEARNERS’ PERSONALITY
The aim of this study was to find out the effectiveness of Computer Assisted Instruction in Teaching Chemistry In Relation To Learners’ Personality. The sample consisted of 40 students in Control group and 40 students in Experimental group. The data were collected using appropriate tools and it was analyzed by t’ and F’ test. The finding is that the achievement scores of Experimental...
3,453 Words | 17 Pages
Importance of Chemistry - 652 Words
Importance Of Chemistry - College Essay - Adarshjj2
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Importance Of Chemistry
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CH 222 ANALYTICAL CHEMISTRY I SYLLABUS
a. Introduction (1.5 hours)
Classification of types of analysis, role and importance of analytical chemistry in various
aspects of life.
b. Steps in a typical quantitative analysis (10 hours)
Emphasis on sampling protocol, sample preparation, wet chemistry methods, statistical
evaluation of data.
c. Review of concepts of stoichiometry (2 hours)
Mole concept, concentrations, dilution and aliquots
d. Review of concepts of...
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Chemistry for Beginners - 561 Words
CHEM 105 Chemistry in the Human Environment
CRN 80464 Fall 2013 General Description CHEM 105 Chemistry in the Human Environment is a onesemester non-mathematical course for liberal arts and non-science majors, which fulfills G.E. requirements in physical sciences. The course stresses a humanistic approach to chemistry, introducing concepts via important social and environmental contexts. Students need not have any previous exposure to chemistry.
Access Requirements No campus visits are...
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effects of chemistry - 433 Words
The gifts of chemistry are a boon to mankind. Its applications in home and industry are many. Right from purified drinking water and motor car to cane sugar and mobile phone, all these have been made possible only through processes in chemistry at some stage or other of production.
New discoveries, processes, and products are an integral part of this fascinating discipline. It offers a fertile ground for those endowed with intellectual curiosity and a passion for scientific research.
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Clinical Chemistry - 598 Words
Ever since I was in school I always wanted to be a medical doctor. Most of my teachers used to ask me about my future ambitions, and I would always tell them that I wanted to be a doctor. The reason for me wanting to be a doctor was the fact that I liked to the idea of treating people without any charges. To me this was a very humanitarian action to do. Therefore, when four of my family members died as a result of blood cancer, I decided that I...
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Chemistry Project - 596 Words
All India Senior Secondary Examination
Examination 2010 - 2011
An investigatory project on
PROJECT: TO STUDY THE PRESENCE OF
OXALATE ION CONTENT IN GUAVA FRUIT AT DIFFERENT STAGES OF RIPENING.
ANUKRITI SHARMA Class- XII – A (sci.) Roll no: 06 Air force school
This is to certify that ANUKRITI SHARMA has satisfactorily completed the project in CHEMISTRY on ‘OXALATE ION´ prescribed by the AISSCE course in this school in...
596 Words | 3 Pages
Chemistry Sy - 323 Words
Fall 2013 –Syllabus
Office Hours: MW, 12:00–12:35 pm & T; 1:40-2:15 pm
Room 92032 and/or Lab 92011.
Email: [email protected] – The best way to reach me is by email. Please indicate your full name and
section number in the “Subject/Re” box. I will not open emails without proper identification.
Welcome to your first course in college chemistry. In this course, we will be exploring laws, theories, and
principles of chemistry as...
323 Words | 3 Pages
IB Chemistry - 412 Words
Using colorimetry to find the order of a reaction
Coloured solutions absorb some of the wavelengths in the visible region of the electromagnetic spectrum. A colorimeter can be used to measure the amount of light absorbed by a solution (the absorbance) and this is proportional to the concentration of the coloured species present. In this experiment you will use a colorimeter to investigate the reaction between bromine and methanoic acid:-
Br2 (aq) + HCOOH (aq) ↓...
412 Words | 2 Pages
Chemistry practical - 332 Words
Chemistry Practical 4: Measuring rate of reaction
Aim of experiment:
To determine the rate of reaction when the concentration of I2 increases.
2Fe3+ + 2I- --> 2Fe2+ + I2
Apparatus & materials:
250ml Conical Flask
100ml or more
332 Words | 13 Pages
Green Chemistry - 735 Words
If We Had Known About Green Chemistry In 1951, How Would Things Be Different Today?
Green Chemistry is the making of chemical products that reduces or eliminates the use and production of hazardous substances in the designing, making, and use of chemical products. It involves the designing and re-designing of chemical creation and chemical products to prevent pollution which will therefore solve environmental problems. Green Chemistry is environmentally safe and has very little side effects...
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The purpose of this experiment is to measure the formation constant of the tetraamminecopper(II) ion by colorimetry. Anhydrous copper sulfate (CuSO4) is white, which means that it does not absorb light in the visible region of the spectrum. The hydrated copper sulfate (CuSO4 - 5H2O) is blue. The structure of the compound can be represented more accurately as Cu(H2O)4 SO4 - H2O where four water molecules are bound to the copper ion and the fifth is a water of crystallization....
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organic chemistry - 2747 Words
Name Naza Moore
Lab instructors Alecia Palmer and Donald Burke
Course Instructor Maureen Wilson
Lab Title Preparation of cyclohexene from cyclohexanol
Aim Preparation of an Alkene by dehydration of an alcohol in the presence of a catalyst.
Calculate the percentage recovery of products.
Test for purity and identification of products.
Cyclohexene and cyclohexanol are both colourless aromatic compounds. The major difference between the two is the...
2,747 Words | 11 Pages
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Coordination compounds are the backbone of modern inorganic and bio-inorganic chemistry and chemical industry. The chemistry of coordination compounds is an important and challenging area of modern inorganic chemistry. During the last fifty years, advances in this area, have provided development of new concepts and models of bonding and molecular structure, novel breakthroughs in chemical industry and vital insights into the functioning of critical...
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Green Chemistry - 454 Words
Many companies all over the world produce chemicals for their products that are harmful to the environment, human health, and to all living species. Green Chemistry is the use of chemistry for the prevention of chemical pollution to the environment by using chemicals that are benign, or not harmful. The Environmental Protection Agency (EPA) states that the mission of Green Chemistry is, "To promote innovative chemical technologies that reduce or eliminate the use or...
454 Words | 2 Pages
Chemistry Dilutions - 307 Words
Name, Date, Hour
Lesson pH and dilutions
Determine the pH of .0103M H3PO4 solution in water. Remember to look at the H+ count.
Box 1 In a dilution, the number of solute particles does not change, just the concentration with respect to the volume. This relationship is _____________________ proportional. Initially, there is 275mL 0.125M stock solution of a substance. -Determine the amount of moles of solute present. -What is the...
307 Words | 2 Pages
What Is Chemistry - 1621 Words
What is Chemistry?
Chemistry is the study of matter and energy and the interactions between them. This is also the definition for physics, by the way. Chemistry and physics are specializations of physical science. Chemistry tends to focus on the properties of substances and the interactions between different types of matter, particularly reactions that involve electrons. Physics tends to focus more on the nuclear part of the atom, as well as the subatomic realm. Really, they are two sides of...
1,621 Words | 5 Pages
Chemistry Final - 404 Words
1) How many hydrogen atoms are represented in the formula (CH3)2CH2? 1) _______
A) 8 B) 6 C) 9 D) 5
2) Which has the highest percent mass of Cl? 2) _______
A) C2Cl6 B) CCl4 C) C2Cl4 D) C2Cl2
3) The correct formula for Sodium Nitride is: 3) _______
A) Na3N B) NaNO2 C) NaNO3 D) Na2NO3
4) How many moles of NO3 are there in 6.2g? 4) _______
A) 0.05 B) 10 C) 0.10 D) 384
5) Consider the following equation:
4NH4 + 5O2 → 4 NO + 6H2O
How many moles of...
404 Words | 4 Pages
chemistry project - 572 Words
Presence of oxalate ions in Guava Chemistry Investigatory Project
Published by M.A.EBENEZER
A chemistry investigatory project on the presence of oxalate ions in guava with all the required sample readings and observations, graphic customized and ready to print.( Though you will need to change the credentials.)
Guavas are plants in the Myrtle family (Myrtaceae) genusPsidium (meaning "pomegranate" in Latin), whichcontains about 100 species of tropical...
572 Words | 2 Pages
Chemistry Scientists - 347 Words
Democritus was born in 460 BCE (estimated) in Abdera, Thrace. Democritus also known as the “Laughing Philosopher”. His theory was the matter could not be divided into smaller and smaller pieces forever, eventually the smallest possible piece would be obtained, and the piece would be invisible. He named the small piece of matter “atomos” meaning “not to be cut”. But as the time continued Aristotle, another Greek philosopher, thought that the atomic theory was...
347 Words | 1 Page
Nuclear Chemistry - 600 Words
Imagine the majority of Earth being quarantined off and people having to live in specified areas to avoid harmful radiation that originated from nuclear energy/waste. The integration of nuclear energy/medicine is largely controversial among people. Every side to the argument has its benefits as well as its negative consequences. Nuclear energy should not be used in society because of the threat it poses to thousands of people. In contrast, nuclear medicine has positive aspects...
600 Words | 2 Pages
Branches of Chemistry - 2559 Words
Atmospheric chemistry is a branch of atmospheric science in which the chemistry of the Earth's atmosphere and that of other planets is studied.
Environmental chemistry is the scientific study of the chemical and biochemical phenomena that occur in natural places. It can be defined as the study of the sources, reactions, transport, effects, and fates of chemical species in the air, soil, and water environments; and the effect of human activity on these. Environmental chemistry is an...
2,559 Words | 9 Pages
Chemistry 12 - 1257 Words
Unit 1 - Reaction Kinetics
Chemistry 12 Worksheet 1-3 - Reaction Mechanisms
1. It is known that compounds called chlorofluorocarbons (C.F.C.s) (eg. CFCl3) will break up in the presence of ultraviolet radiation, such as found in the upper atmosphere, forming single chlorine atoms: CFCl3 CFCl2 + Cl The Cl atoms then react with Ozone (O3) as outlined in the following mechanism. Step 1: Step 2: Cl + O3 ClO + O2 ClO + O Cl + O2
(single "O" atoms occur naturally in the...
1,257 Words | 8 Pages
Green Chemistry - 2382 Words
Green chemistry for chemical synthesis addresses our future challenges in working with chemical processes and products by inventing novel reactions that can maximize the desired products and minimize by-products, designing new synthetic schemes and apparatus that can simplify operations in chemical productions, and seeking greener solvents that are inherently environmentally and ecologically benign.
Nowadays, one can hardly turn on the television or open a newspaper...
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Chemistry Lab - 687 Words
Colligative Properties Lab
Demonstration of Selected Calculations from Choice I
Determination of Kf for Naphthalene
To determine the Kf for naphthalene, we need to find the difference in the freezing point of pure naphthalene and the solution of 1,4-dichlorobenzene in naphthalene. Let's say that we did this experiment, used 1.00 g 1,4-dichlorobenzene in 10.00 g naphthalene, and found that the freezing temperature of pure naphthalene was 78.2°C, while that of the solution was...
687 Words | 2 Pages
Chemistry Project - 427 Words
Name: Shahid Hussain
Teacher: Dr Ramani
Topic: Comparing Solutions
Saturated Solutions |
A solution that can hold no more of the solute at a particular temperature is said to be a saturated solution at that temperature. |
When someone adds sugar to iced tea, the sugar disappears. If you add one teaspoon of sugar to iced tea, you get an unsaturated solution. If you...
427 Words | 2 Pages
Concepts of Chemistry - 1274 Words
Chemistry 101 Chapter 4 Practice Test
1. A 20.0-g sample of HF is dissolved in water to give 2.0 102 mL of solution. The concentration of the solution is:
a) 1.0 M
b) 3.0 M
c) 0.10 M
d) 5.0 M
e) 10.0 M
Ans: d) 5.0 M Page: 4.3
2. Which of the following aqueous solutions contains the greatest number of ions?
a) 400.0 mL of 0.10 M NaCl
b) 300.0 mL of 0.10 M CaCl2
c) 200.0 mL of 0.10 M FeCl3
d) 200.0 mL of 0.10 M KBr
e) 800.0 mL of 0.10 M sucrose...
1,274 Words | 7 Pages
Analytical Chemistry - 1126 Words
Analytical Chemistry is the branch of chemistry principally concerned
with determining the chemical composition of materials, which may be solids,
liquids, gases, pure elements, compounds, or complex mixtures. In addition,
chemical analysis can characterize materials but determining their molecular
structures and measuring such physical properties as pH, color, and solubility.
Wet analysis involves the studying of substances that have been submerged in a
1,126 Words | 4 Pages
Chemistry and Zinc - 933 Words
Pre Lab Experiment 8
DETERMINATION OF % COMPOSITION OF PENNIES USING REDOX AND DOUBLE DISPLACEMENT (PRECIPITATION) REACTIONS
1. Learn how to determinate the percent composition
2. Learn how to get the percent using oxidation reduction and double reactions
3. To become more familiar with the use titration techniques
4. To learn how to get the salt out of an quimical
To develop and utilize procedures to determine the percent composition, of ZnCI2. As well...
933 Words | 4 Pages
Polymer Chemistry - 535 Words
Name of Career: Polymer Chemist
Specialized Training: Chemical synthesis & properties of polymers and macromolecules
Salary: $78,000 per year
Location Restrictions: Work is done in a laboratory setting
Background Required: Need; Bachelor’s Degree in chemistry, chemical engineering, or synthetic engineering & prior lab experience. To continue your career, it is recommended to get a master’s or doctoral degree and courses in communication/presentation skills.
535 Words | 2 Pages
organic chemistry - 2474 Words
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2,474 Words | 8 Pages
Chemistry Lab - 746 Words
Name: Marisa Malazzo
Exp 1: Observations of Chemical Changes
Lab Section: 76426
Observations of the Reaction
NaHCO3 + HCl
no color change, some small bubbles formed
HCl + BTB
changed a yellowish orange color, no bubbles or precipitation
NH3 + BTB
changed a blue color
HCl + blue dye
changed a green color
Blue dye + NaOCl
no chemical change, only blue color appeared
with the 1...
746 Words | 5 Pages
Chemistry Review - 4282 Words
What You Need To Know for the Chemistry Regents Exam
The Chemisty Regents Exam is broken down into three sections:
Part A: 35 mulitple choice questions from all units covered over the
course of the school year.
Part B: Approximately 25 questions, with a mix of short answer
and multiple choice. Questions focus on the Reference
Tables, graphing, and laboratory experiments.
Part C: Approximately 15 short answer questions, most broken
down into smaller parts. This is often...
4,282 Words | 17 Pages
Chemistry Essay - 604 Words
Becoming a Greek philosopher I would never of thought that I was best known for my atomic theory of the universe, and leave a lasting impact on western civilization throughout my time. I was born in Abdera, Greece around the year 460 BC. My journeys led to far off places that include Egypt, where I learned geometry from the high priests, and also traveled throughout Persia and India. My literature extended over a period and produced over 65 works, including essays on mathematics, astronomy,...
604 Words | 2 Pages
Chemistry Paper - 1405 Words
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Level
CHEMISTRY Paper 5 Planning, Analysis and Evaluation Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs or rough working. Do not use staples, paper clips,...
1,405 Words | 7 Pages
Chemistry Guidelines - 1707 Words
CHEMISTRY COURSE EXPECTATIONS
PURPOSE: The purpose of this course is to provide students with a basic understanding of the fundamental theoretical and applied aspects of general Chemistry. The course has been designed for beginning Chemistry students, and it covers topics such as the metric system, atomic structure, periodic table, energy, chemical names & formulas, chemical reactions, nuclear chemistry, the mole, stoichiometry, gases, and more. Students will also learn basic...
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Careers in Chemistry - 488 Words
Chemistry is one of those subjects in school that you can take in college at an advanced level. Taking Chemistry can benefit a person in ways that you might have not thought. Chemists might actually make more money than you might have thought. You might be interested in a chemistry career, so read the following and see for yourself if chemistry is the career path for you.
The Product Development Chemist develops new products and technologies, improves older products or their methods of...
488 Words | 2 Pages
Chemistry in Engineering - 477 Words
All India Council for Technical Education (AICTE) vested with statutory powers by virtue of the AICTE Act 1987, in pursuance of its clause 10(2) has main objective of bringing about uniformity in the curriculum of engg. in hundreds of technical institutions/universities spreading across the country . With this view, the AICTE has formulated a model curriculum / guidelines /regulations at the level prepared by All India Board of UG Studies in E&T with working groups composed of experts from...
477 Words | 2 Pages
organic chemistry - 534 Words
CHEM 2018 Organic Lab Part 2
Experiment 7: Diethyl n- Butylmalonate
Reference: Williamson K.L., &...
534 Words | 4 Pages
Chemistry Lab - 367 Words
Access the virtual lab and complete the experiments.
Part One (Flame Test):
1. Create and complete a data table for Part One of the lab. It should include the name of the element (or unknown) examined and the color of the observed flame:
2. Identify each unknown from Part One of the lab and briefly explain why you identified each unknown as you did.:
Unknown 1-yellow. I think it is Sodium...
367 Words | 2 Pages
Chemistry Assessment - 1027 Words
Chapter Test B
Chapter: Matter and Change
PART I In the space provided, write the letter of the term or phrase that best
completes each statement or best answers each question.
______ 1. Chemistry is a natural science that deals with the study of
a. living things and their life processes.
b. the physical features of Earth.
c. the composition, structure, properties, and changes of matter.
d. the composition, motion, and relative...
1,027 Words | 16 Pages
Alchemy to Chemistry - 508 Words
ALCHEMY TO CHEMISTRY
Can we say that alchemy and chemistry are two different things? Actually no, we can’t. Alchemy is the pioneer of today’s modern chemistry. As the time passed alchemy has changed and developed to form Chemistry. Therefore we shouldn’t think that they are two different subjects.
In this article, first of all you will learn how alchemy was found and evolved .After that how it transitioned from alchemy to chemistry and finally the similarities and differences between them....
508 Words | 2 Pages
The Chemistry of Fireworks - 2785 Words
A firework is an incendiary device or material that can be used forsignalling orentertainment. There are chemicals located in the nose ofthe rocket that explode, producing the colours seen.
The art of fireworks, first originated in ancient China, with thefirst explosive being made from a mixture of black powder during theSung dynasty. It is believed that the explosive mixture was created bya combination of sulfur, saltpeter and charcoal. The Chinese foundthat the combination of these...
2,785 Words | 11 Pages
Chemistry Lab - 624 Words
The purpose of this lab was to see which solutions are soluble and which are not. We were able to see this by mixing certain solutions together and observing changes that occurred.
The procedure for this experiment included a few different steps. The first steps were to add the nitrate solutions into the lettered parts of the 96-well plate. Once you were done with that, you were supposed to add the sodium solutions to the numbered parts of the 96-well plate, so that the solutions were added...
624 Words | 2 Pages
Solutions in Chemistry - 521 Words
Solutions are a combination of solvents and solutes. When a solute dissolves into a solvent, the combined product of the two reactants is called a solution.
The definition of a solute is the reactant that's being dissolved. The only difference from a solute and a solvent is that the solvent is the one that's doing the dissolving. Molecules randomly flow in all directions until there is an equal concentration throughout the solution.
The dissolving process can vary...
521 Words | 2 Pages
Cooking Is Chemistry - 428 Words
4 March 2013
Cooking is chemistry. Everything is essentially chemical reactions. If you don’t mix the correct amount of grams of one element with another the product can result to be horrendous. The formula of sugar is C12H22O11. When you mix a certain amount of that into a solution of water with the addition of tea you a drink called sweet tea. Let’s say you mix add more C12H22O11 than water. Then your product will be syrup; a...
428 Words | 2 Pages
Chemistry Formula - 834 Words
ΔT1 = Kfm
where Kf is a constant that depends on the specific solvent and m is the molality of the molecules or ions solute. Table 1 gives data for several common solvents.
Table 1. Molal Freezing Point and Boiling Point Constants |
Solvent | Formula | Freezing Point (°C) | Kf(°C/molal) | Boiling Point (°C) | Kb(°C/molal) |
Water | H2O | 0.0 | 1.86 | 100.0 | 0.51 |
Acetic acid | CH3COOH | 17.0 | 3.90 | 118.1 | 3.07 |
Benzene | C6H6 | 5.5 | 4.90 | 80.2 | 2.53 |
Chloroform | CHCl3 |...
834 Words | 3 Pages
Chemistry Chapter2 - 955 Words
Extracted from the notes of Dr. Sylvia Eramis Dasalla
San Pedro College
GENERAL INORGANIC CHEMISTRY
Matter & Energy
Matter - is anything that occupies space and has mass
Mass is the measure of the amount of matter in an object.
Weight is the measure of the gravitational force for the matter in an object.
Phases of Matter
* Solid (s)
* Liquid (l)
* Gas (g)
Properties of Solids, Liquids, and Gases
Property | Solid | Liquid | Gas |...
955 Words | 6 Pages
Importance of Chemistry - 911 Words
SUMMARY FOR GRADE 7 FIRST SEMESTER
Importance of Chemistry Chemistry is an important branch of science. Chemistry deals with the matter that form our environment and the transformation that the matter undergoes. Chemistry is therefore, useful in understanding the changes taking place in the constituents of the environment and the resulting advantages. Chemistry is connected with composition, structure and properties of the matter. In fact it is a science of atoms and molecules. Organic...
911 Words | 3 Pages
Chemistry and Importance - 1955 Words
IUBAT- International university of Business Agriculture and Technology
Course name- General Chemistry
The importance of Chemistry in our daly life
The chemistry is the study of substances specially their structure, properties, transformations and the energy accompanying these transformation.
Chemistry is very important within our daily lives. We are using it all of...
1,955 Words | 7 Pages
Chemistry Project - 424 Words
Company #1: Neils Bohr Equation: 3Na2CO3 + 2AlPO4 = 2Na3PO4 + Al2(CO3)3
Reaction: Double Displacement
Company #2: Hello Equation: C5H12 + 8O2 = 5CO2 + 6H2O
Company #1 Neils Bohr 3Na2CO3...
424 Words | 2 Pages
Forensic Chemistry - 8438 Words
Forensic Chemistry Exam 2
I have been honest and observed no dishonesty.
1. In specific detail, describe a published procedure for the definitive identification of Heroin utilizing gas chromatography-mass spectroscopy (GCMS).
Heroin is a white crystalline powder with no odor and a bitter taste. It is a derivative of morphine in that the –OH (hydroxyl group) is replaced by an acetyl group, -OCOCH3 and has a molecular formula is C21H23NO5 with a molecular weight of...
8,438 Words | 25 Pages
Chemistry Test - 792 Words
1) What is matter?
2) What is mass?
3) Matter that has a uniform and definite composition is called a ______. Give an example.
4) A quality/condition of a substance that can be observed/measured without changing the substance is a ________ __________. Give examples.
5) What are the three states of matter? Put the correct state of matter in each box.
6) What is the difference between gas and vapor?
7) What is a physical change? Give an example.
8) A physical...
792 Words | 3 Pages
Chemistry of Hairspray - 1130 Words
The chemistry of hairspray
What is hairspray: introduction
Hair spray (or hair lacquer) is a common household aqueous solution that is used to keep hair stiff or in a certain style. Weaker than hair gel, hair wax, or glue, it is sprayed to hold styles for a short period of time. Using a pump or aerosol spray nozzle it sprays evenly over the hair. Hairspray was first developed and manufactured in 1948 by Chase Products Company, based in Broadview, Illinois.Its active ingredient is a suitable...
1,130 Words | 4 Pages
Chemistry and Life - 1075 Words
Describe the concept of atoms and molecules as a basis for the physical and chemical prosperities of living and non-living things.
The entire universe consists of matter, everything from planets and stars, to trees, water and organisms. Matter is comprised of atoms, the smallest subunit of elements, which can be singular or molecular to form larger units. Non-living things, such as a red housing brick, or a metal zip do not require any extra elements to hold shape or produce energy and they...
1,075 Words | 3 Pages
Chemistry and Its Importance - 484 Words
Question: What Is the Importance of Chemistry?
What is the importance of chemistry? Why would you want to learn about chemistry? Chemistry is the study of matter and its interactions with other matter and energy. Here's a look at the importance of chemistry and why you should study it.
Answer: Chemistry has a reputation for being a complicated and boring science, but for the most part, that reputation is undeserved. Fireworks and explosions are based on chemistry, so it's definitely not a...
484 Words | 2 Pages
Analytical Chemistry - 671 Words
CHM 256: BASIC ANALYTICAL CHEMISTRY
TUTORIAL 1: INTRODUCTION: ANALYTICAL CHEMISTRY
1. What is chemical analysis?
2. Differentiate between qualitative and quantitative analysis (Oct 2008, 2009, Dec 2009, Apr
3. Give 7 steps in performing any chemical analysis (Apr 2010)
4. Briefly explain how to prepare the following solutions:
a) 1.0 L 10.50 % (w/v) aqueous CH3CH2CH2OH (answer : 105 g) (Oct 2006, Oct 2007,
b) 500 mL 2.0 M H2SO4 from a commercial reagent, at 90% (w/w)...
671 Words | 4 Pages
Sustainable Chemistry - 7070 Words
Toward Sustainable Chemistry
Chemistry has an important role to play in achieving a sustainable civilization on Earth. The present economy remains utterly dependent on a massive inward flow of natural resources that includes vast amounts of nonrenewables. This is followed by a reverse flow of economically spent matter back to the ecosphere. Chemical sustainability problems are determined largely by these economy-ecosphere materials flows (see the figure, below), which...
7,070 Words | 26 Pages
Chemistry Syllabus - 1107 Words
GENERAL CHEMISTRY: Atomic Structure and elementary quantum mechanics: Blackbody radiation, Planck’s radiation law, photoelectric effect, Compton Effect, de Broglie’s hypothesis, Heisenberg’s uncertainty principle. Postulates of quantum mechanics, Schrodinger wave equation and a particle in a box, energy levels, wave functions and probability densities, Schrodinger wave equation for H-atom, Separation of variables, Radial and angular functions, hydrogen like wave functions, quantum...
1,107 Words | 4 Pages
Importance of Chemistry - 435 Words
The importance of chemistry, or any other area of study, depends entirely on how relevant it is to some desired outcome. If you wished to create a new type of plastic, chemistry would be highly important, but if you wished to develop a new music genre, chemistry would probably be of no importance at all.
It is extremely important. That aspirin or tylenol you may take for a headache was made by chemists, as are antibiotics, and other prescription meds. Not only are chemists in the drug trade,...
435 Words | 2 Pages
Role of Chemistry - 1113 Words
A. Role of Chemistry in Society
Applications of chemical science have contributed significantly to the advancement of human civilization (1, 2, 3). With a growing understanding and ability to manipulate chemical molecules, the post-World War II chemist was considered a societal problem solver. They synthesized crop-enhancing agricultural chemicals to ensure a constant and viable food supply. They played a significant role in the eradication of deadly diseases by developing life-saving...
1,113 Words | 5 Pages
Chemistry studies - 2700 Words
1. Give the percentage of each component present in air.
The atmosphere of Earth is a layer of gases surrounding the planet Earth that is retained by Earth's gravity. Theatmosphere protects life on Earth by absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night (the diurnal temperature variation).
The common name given to the atmospheric gases used in breathing and photosynthesis is air. By...
2,700 Words | 9 Pages
Chemistry Igcse - 1845 Words
1) Demonstrate understanding of the terms atom and molecule.
Atom= Smallest Unit of Matter
Molecule= 2 or more atoms chemically bonded.
2) Describe paper chromatography.
3) Interpret simple chromatograms.
A method used to separate a Solution, using a Paper and a beaker of water. The Substances in the Paper go up depending on their Mass. We can say that a Solution has the same substance as another solution because they form a line of the same height.
4) Describe methods of...
1,845 Words | 9 Pages
Chemistry work - 393 Words
1. Compare the general properties of acids with the general properties of bases.
Aqueous solutions of acids have a sour taste.
Acids change the color of acid-base indicators.
Some acids react with active metals and release hydrogen gas,H2.
Acids react with bases to produce salts and water.
Acids conduct electric current.
Aqueous solutions of bases taste bitter.
Bases change the color of acid-base indicators.
Dilute aqueous solutions of bases feel...
393 Words | 2 Pages
Organic Chemistry - 255 Words
Course Number: Course Name:
GE304 FUNDAMENTALS OF MATERIALS SCIENCE AND ENGINEERING
Course Description: Structure and composition of materials (metals, polymers, ceramics and composites). Processing, properties and behavior in service environments. No. of Units for Lecture and Laboratory: 3 units lecture No. of Contact Hours per week 3 hours lecture Prerequisites General Chemistry, Physics 2 Course Objectives At the end of the course the student must be able to: 1. Identify the importance...
255 Words | 1 Page
The Importance of Chemistry - 306 Words
important of chemistry in our future career a
important of chemistry in our environment
chemistry is used in many ways in computers also.for example.,we use many elements like silicon,zinc,aluminium,copper etc.,. in designing and in developing the hardware of computer.
In the last 30 years, information technology, wireless communications, and advanced computer, internet, and software-related innovations have transformed the way we live and how we connect with one...
306 Words | 2 Pages
Chemistry Lab - 1048 Words
Identification of a Copper Compound by Percent Mass
Unknown Compound: #9
The objective of this experiment was to identify the unknown pure copper salt compound of #9. To do this, the mass of copper in the unknown was calculated and then divided by the mass of the whole compound to get the percent copper. The molecular weight was also calculated by dividing mass of copper compound used by moles of compound in unknown sample. The percent copper averaged out to 31.6% while the...
1,048 Words | 5 Pages
Chemistry Cousework - 616 Words
Chemistry Coursework – Titration
A titration is the neutralisation of an acid or an alkali. To achieve this, one must be added to the other in a specific amount, strength and concentration.
A substance is neutral when its pH is 7. It is most acidic closer to 0 and is most alkaline closer to 14.
28492453194050 0 7 14...
616 Words | 3 Pages
Chemistry and Society - 1061 Words
Chemistry and Society
March 17, 2012
Chemistry is very important in our lives even though we may not realize that chemistry is everywhere. This paper serves to examine the ways in which chemistry is relevant in everyday life and in society. It will also examine the difference between accuracy and precision and provide examples of when accuracy and precision are crucial in measurements and why society depends on these measurements to be accurate and precise (...
1,061 Words | 3 Pages
Chemistry Lab - 293 Words
Investigating Chemical Equilibrium
(Experiment 19 A)
1. to recognize the macroscopic properties of five chemical systems at equilibrium
2. to observe shifts in equilibrium concentrations as stresses are applied to the systems
3. to observe a shift in equilibrium concentrations associated with changes in temperature
4. to explain the observations obtained by applying Le Chatelier’s principle
See page 209 Heath Chemistry Laboratory Experiments...
293 Words | 2 Pages