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Lab Partners: Hannah, Kellie, Chandler
Title
Sugar Content in Beverages
Date
Date Started- 8/28/13
Date Finished- 8/28/13
Purpose
To test the density of sugar in a beverage
Equipment
300mL beaker
250mL beaker
100mL graduated cylinder
Celsius thermometer
Metric Balance
Procedure
1) Place a clean 100mL graduated cylinder on the balance and hit the “rezero” button. 2) Fill the cylinder to the 10mL mark with a beverage. Measure and record the mass of the beverage in the graduated cylinder. 3) Measure and record the temperature of the beverage.
4) Rezero the balance with the graduated cylinder containing the beverage. Fill the graduated cylinder to the 20mL mark with a second sample of the same beverage. Measure and record the mass of the beverage sample in the graduated cylinder. 5) Calculate and record the density of each beverage sample.
Calculations and Graphs
See table
Conclusions
Seemingly healthy drinks can have high sugar contents.
Discussion of Theory
This experiment worked on the idea of density.
Experimental Sources of Error
-Graduated cylinder not accurate enough
-Miscalculated data
Show More
...
Period 0
DensityLab
Purpose
The purpose of the lab is to find out the density of stoppers, the density of a 100% sucrose solution, and to figure out the density and the percentage of sucrose in the unknown solution. To find out the density, the mass and volume needs to be measured for all three. Then, the mass will be divided by the volume. To find out the percentage of sucrose in the unknown solution, there has to be a comparison between the density of the unknown solution and the densities of different percentages of sucrose solutions.
Results
Density of Stoppers
Trial
Mass of Stopper (g)
Volume of Stopper (mL)
Density (g/mL)
1
6.0
4.9
1.2
2
4.1
3.2
1.3
Average Density
1.3
Density of 100% Sucrose Solution
Trial
Mass of Sample (g)
Volume of Sample (mL)
Density (g/mL)
1
49.4
44.2
1.12
2
61.0
54.1
1.13
Average Density
1.13
Density of Solution
Trial
Mass of Sample (g)
Volume of Sample (mL)
Density (g/mL)
1
55.4
52.1
1.06
2
32.5
31.1
1.05
Average Density
1.06
Actual Density for Different Percentages
Calculations
To find the density of the stopper for the first trial, 6.0 g was divided by 4.9 mL, which equals 1.2 g/mL. The...
...Introduction
In the densitylab unknown metals were weighed using beakers filled with water and an electronic scale. First the metal objects were weighed using an electronic scale. Then using water, the beakers were filled half way. Next, the metal objects were poured in. Then the amount of how much the water rose after the metal was put in is checked. Lastly, record the data and clean the objects used and put away.
Design
Research question: If mass and volume are correctly measured can the density of an unknown metal be calculated.
Variables:
Controlled: Water, Electronic Scale, Graduated Cylinder
Dependent: Density; Mass and Volume
Independent: Metal(s)
Method
Apron, Goggles, Electronic Balance, Beaker, Graduated Cylinder, water, unknown metal samples
Labeled Diagram
Uncertainties: Electronic Balance ± 0.01g
Hexagon ± 0.0mL Graduated Cylinder ± 1.0 mL
The independent variable is measured based off the how much the water rises.
The dependent variable is measured when the Initial Volume is subtracted from the final volume, which gives the density of the metal sample.
Controlling the Controlled Variables: The water and electronic scale were controlled. These materials were controlled because the amount of water put into the graduated cylinder could differ, and if the scale is not zeroed again after putting down the paper towel the mass could be...
...Lab # 4 Determination of Density of Liquids Name:
Lab Partner: Period: 3
Date Completed: 9/23/2014
Date Submitted: 9/29/2014
Data
TABLE 4
DENSITY OF SALT SOLUTIONS-INDIVIDUAL GROUP’S RESULTS
Concentration (%)
Mass (g)
Volume (mL)
Density (g/mL)
0
9.9522
10.00
0.9952
4
10.1291
10.00
1.013
8
10.5233
10.00
1.052
12
10.7487
10.00
1.075
16
11.0297
10.00
1.103
Unknown #
10.6234
10.00
1.062
Calculations
1. Show all density calculations.
Density : Mass / Volume
9.9522 / 10.00 = 0.9952 g/ml
10.1291 / 10.00 = 1.013 g/ml
10.5233 / 10.00 = 1.052 g/ml
10.7487 / 10.00 = 1.075 g/ml
11.0297 / 10.00 = 1.103 g/ml
10.6234 / 10.00 = 1.062 g/ml
2. Be sure to include the Excel graph you have created from your data. Using the density of the unknown, determine the percentage of the unknown solution by using the
trendline formula. Determine if there is a positive linear correlation.
Unknown = 10.13 % NaCl by mass
Correlation coefficient = 0.9902 therefore
TABLE 5
DENSITY OF SALT SOLUTIONS- CLASS AVERAGE
Concentration (%)
Density (g/mL)
0
0.9487
4
0.9497
8
1.017
12
1.047
16
1.078
Unknown
1.048
3. Use Excel to produce a graph showing the...
...Ashley Robins
9/13/11
Honors Chemistry
Period 4
DensityLab
Purpose:
1. To determine the density of a solid using different laboratory techniques for measuring volume.
2. To use the intensive property of density to identify an unknown substance.
Procedure:
1. Obtain a bag marked with a number containing a cube and a cylinder from the teacher. Record the number on the bag in the data table.
Density of a cube:
Using a balance, record the mass of the cube to the nearest tenth of a gram. Then measure the length, width and height of the cube to the nearest hundredth of a cm. Last, calculate the volume of a cube using the formula L x W x H.
Density of a cylinder by water displacement:
Using a balance, record the mass of the cylinder to the nearest tenth of a gram. Then fill a graduated cylinder of water about half full. Record the volume to the nearest tenth of a mL. After that you carefully drop the cylinder in the graduated cylinder and record the new volume of water to the nearest tenth of a mL. The last thing you do is subtract the volume of the water you had at the beginning from the volume of water you had after adding the cylinder. This number is the volume of your cylinder.
Data:
Cube Cylinder
Mass of cube:10.4g Mass of cylinder: 29.1g
Length of cube:2.50cm...
...Density of a regular shaped object
Object Mass / g
± 0.05 g * Length / cm
± 0.003 cm ** Width / cm
± 0.003 cm ** Height / cm
± 0.003 cm **
T1 T2 T3 T4 T5 T1 T2 T3 T4 T5 T1 T2 T3 T4 T5
A 44.9 5.975 5.980 5.980 5.980 5.975 1.500 1.500 1.500 1.500 1.500 0.600 0.600 0.605 0.600 0.600
B 16.5 4.400 4.395 4.400 4.395 4.395 1.500 1.500 1.495 1.500 1.495 0.300 0.305 0.305 0.300 0.300
C 22.5 3.000 2.995 3.000 3.000 3.000 1.500 1.505 1.495 1.500 1.500 0.600 0.595 0.600 0.595 0.595
D 22.6 6.005 6.000 6.010 6.005 6.000 1.500 1.500 1.495 1.500 1.495 0.295 0.300 0.300 0.305 0.300
E 11.4 3.040 3.045 3.040 3.075 3.070 1.500 1.495 1.500 1.500 1.495 0.300 0.300 0.305 0.300 0.300
F 5.80 1.550 1.550 1.540 1.550 1.550 1.495 1.500 1.500 1.495 1.500 0.300 0.300 0.300 0.300 0.300
Table 1: Raw data table
Half the smallest division: 0.1 ÷ 2 = 0.05 g
** Half the smallest division: 0.005 ÷ 2 = 0.0025 ≃ 0.003 cm
Inaccurate set of data due to random error. (See Evaluation)
Table 2: Data processing 1
Object Mass / g
± 0.05 g Average L / cm Abs. Unc. L / cm Average W / cm Abs. Unc. W / cm Average H / cm Abs. Unc. H / cm
A 44.9 5.98 0.006 1.50 0.003 0.60 0.007
B 16.5 4.40 0.006 1.50 0.006 0.30 0.006
C 22.5 3.00 0.007 1.50 0.008 0.60 0.006
D 22.6 6.00 0.009 1.50 0.006 0.30 0.008
E 11.4 3.06 0.03* 1.50 0.006 0.30 0.007
F 5.80 1.55 0.02* 1.50 0.006 0.30 0.003
Since the uncertainties can only be written with 1 s.f, the number of decimal places cannot...
...their society has been overtaken by whites, and their customs and traditions have been influenced and combined with the new society.
Example
“Ay! You…dawarra you mirri up and get them clothes down the soak….go on!
Protest is important to maintain the survival of aboriginal people of Australia.
Explanation
Jimmy Munday survives as an individual because he has the ability to protest against the Neville chef protector of aborigines. He finds his identity within his family and this security allows him ot critically assess and comment on the motives behind government decisions such as the moving of indigenous people from the Government Well Aboriginal Reserve in Northam to Moore River.
Example
Jack Davis shows this to be true in no sugar when Jimmy said ”Whole town knows why we’re goin”.”Coz wetjalas in this town don’t want us ‘ere’.” Jimmy’s identity and survival are built on outward protest but other members of his family find more subtle forms of protest. Therefore, this whole concept represents that the protest againt the motives of white people has lead the Aboroginal people to survive in a great depression.
Paragraph 3
Topic sentence
Famliy is the cornerstone and also maintain the survival of individual even in most traumatic of circumstances.
...
...Stella Lee
Density
February 29, 2013
Block: 4
Purpose:
Practice techniques and calculations for determining volume and density.
Safety:
Wear goggles and a lab apron or coat.
Equipment & Materials:
* Block
* Graduated Cylinder
* Water
* Solution A
* Pennies
* Dropper Pipette
* Film Canister
* Metal Shot
* Calculator
* Weighing Boat
* Beaker
Observations & Data:
Observations: Part F
Description of Ice in WaterThe ice is floating under the water line. | Description of Cork in WaterThe cork also floats, half of the cork is below the water line and half is above. |
Description of Ice in AlcoholThe ice did not float; it sunk and went all the way to the bottom. | Description of Cork in AlcoholThe cork floats, more than half is below the water line and a little above. |
Data: Part A
Item | Value |
Length of Object | 8.5 cm |
Width of Object | 5.5 cm |
Height of Object | 1.5 cm |
Mass of object | 61.29 g |
Data: Part B
Item | Value |
Mass of Object | 29.25 g |
Volume of Water in Graduated Cylinder before Object Immersed | 60 mL |
Volume of Water in Graduated Cylinder after Object Immersed | 60 mL |
Data: Part C
Item | Value |
Mass of Empty Graduated Cylinder | 44.96 g |
Mass of Graduated Cylinder and Solution A | 79.29 g |
Volume of Solution A in Graduated Cylinder | 30 mL |
Data: Part D
Item | Value |
Number of...
...Density Column
What is density?
We will be working with many different liquids. Each of the liquids has a different, characteristic density. One way to think about density is how thick or heavy an object is. The liquids with lighter densities will float. The liquids with heavier densities will drop to the bottom. You may have noticed that sometimes, liquids mix together – this is because the chemicals dissolve in each other. During our experiment, the liquids will stay separate because we will add the liquids in order of decreasing density! As long as the materials do not mix or react, the less dense materials will float on top of the more dense ones. This lab will create colorful, layered rows.
Density can be calculated! Density values are often used in scientific calculations!
Density
=
Mass
Volume
Mass is related to weight, or how heavy something is, and Volume is how much space the liquid takes up. Density is simply the mass of a substance divided by its volume!
Procedure
We will use 5 different liquids:
A. Vegetable oil
B. Dishwashing liquid
C. Honey
D. Water
E. Rubbing alcohol
Since all of the liquids are in containers of equal volume, you can put the liquids in order of increasing density by their weight. Pick up each container; which one feels...