PART 2 DATA Experimental Volume of Water Accepted Volume of Water Trial (Read from graduated cylinder (Calculated from the mass Percent in mL) and...
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have to make 2 graphs with 2 sets of data on it.

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PART 2
DATA
Experimental Volume of Water
Accepted Volume of Water
Trial
(Read from graduated cylinder
(Calculated from the mass
Percent
in mL)
and density in mL)
Error
1
OML
OML
2
6. 10mL
4.68 ml
30.3%%
3
10.00mL
9.20 mL
8. 70% %
4
14. 90 mL
14.08 ml| 5-82%
5
19. 90 ML
18.88 ml 15.40%
6
24. 90 ML
23. 93 ml /4.05%%
7
30. 10 ML
28, 99 ML 3.83%
8
34, 75 ml
33. 83 ml 2.72%
19
40. 10 ML
38. 88 ML 3.14%
10
49. 85 ML
43. 53 ml / 14.5%
14

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POST-LAB QUESTIONS
1. Using a T-square and pencil estimate the mass of 25 drops of water from Graph 1. Show your
work on the graph and write your final answer below.
2. The slope of graph 1 for the drops of water can be interpreted as a useful quantity around the
lab. Explain the significance of the slope and how it might be used around the lab. Hint:
consider the units of the slope.
3. Based on the trend in Graph 2 does the percent error increase or decrease as the volume
measured with the graduate cylinder increases?
In science a 5% error is considered acceptable in many cases. Based upon the data in Graph 2
estimate the volume at which the percent error of the volume measured with the 50 mL
graduate cylinder would be 5%. If your data is all well below 5% and it is difficult to
extrapolate this far answer the question for 1% error.
15

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EXPERIMENTAL PROCEDURE
SAFETY
GOGGLES
PART 1.
When measuring masses in the procedure below refer to the appendix "Measuring the mass of an
object on a triple-beam balance" if you are not familiar with the use of the triple-beam balance.
1. From the laboratory stock cart obtain a weighing boat.
2. From your kit obtain a 50 mL beaker and an eyedropper.
3. Using the squirt bottles at your bench place about 25 mL of distilled water in the 50 mL
beaker.
Numb
4. Place the weighing boat on the triple-beam balance and measure its mass. Record this value
in the data table as the Total Mass for 0 drops added.
5. Add 10 drops of distilled water to the weighing boat and measure the mass of the weighing
boat plus distilled water. Record the mass in the data table.
Repeat this step nine times measuring and recording the mass of the weighing boat plus 20
drops, 30 drops, 40 drops etc. up to a total of 100 drops of distilled water.
6. Prepare a soap solution by mixing one drop of soap in about 25 mL of distilled water in a 50
mL beaker. Repeat the steps above using this soap solution instead of distilled water. It is not
necessary to clean or dry the weighing boat, but empty it of the 100 drops added in step 5.
7. Prepare a single graph of Total Mass versus the Number of Drops with the data for both
water and the soap water solution. Use different symbols for each, and include a legend on
the graph defining the symbols.
Interpret each data set by drawing a line or curve that you think best represents the trend.

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SEVENTH EDITION
sams
PART 2
When measuring masses and volumes in the procedure below refer to the appendices "Measuring
the mass of an object on a triple-beam balance", "Reading measurement devices with markings",
and "Reading liquid Levels if you are not familiar with these procedures already.
1. From your kit obtain a 50 mL graduated cylinder.
2. Measure the mass of the graduated cylinder. Record this mass in the data table as the Mass of
Graduated Cylinder.
3. Using a squirt bottle add about 6 (+ 1 mL) of distilled water to the 50 mL graduated cylinder.
4. Read the graduated cylinder to measure the volume of water. Record this volume in the data
table as the Experimental Volume of Water.
5. Measure the mass of the graduated cylinder and the added water. Record this mass in the data
table as the Mass of Graduated Cylinder and Water.
6. Calculate the mass of water added to the graduated cylinder by subtracting the Mass of
Graduated Cylinder, from the Mass of Graduated Cylinder and Water. Record this value in the
data table as the Mass of Water.
7. Discard the water from the graduated cylinder.
8. Repeat steps 3-7, eight more times, but instead of using about 6 mL use about 10, 15, 20, 25,
30, 35, 40, and 45 mL of water.
9. Calculate the volume for each value of the Mass of Water assuming a density of 1.00
gram/mL for water. Record the results on the data table as the Accepted Volume of Water.
10. Calculate the percentage error for each volume measured by reading the graduated cylinder
using the equation in the introduction to this experiment. In this calculation you will be
assuming that the balance is calibrated and is therefore accurate. Therefore, the Accepted
Volume of Water calculated in the last step can be taken as the accepted value in the formula
for the Percent Error, and the Experimental Volume of Water obtained from reading the
markings on the graduated cylinder will be taken as the experimental value.
11. Construct a graph of Percentage Error versus Experimental Volume of Water. When
constructing this graph plan to extrapolate the volume down to 0.0 ml and 0.0% error and up
to 5% error.

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EXPERIMENT # 2
DATA COLLECTION AND GRAPHING
LABORATORY REPORT
PART 1
DATA
Distilled Water
Distilled Water + Soap Solution
Total Number
Drops Added
Total Mass (g)
Total Number
Drops Added
Total Mass (g)
0
2.40 a
0
2.60 9
10
2. 90 9
10
2.80 a
20
3.20 a
20
3.05 9
30
3.50 a
30
3. 20 a
40
3. 809
40
3.50 9
50
4. 10 9
50
3. 75 9
60
4. 40 0
60
4.00d
70
4. 709
70
4.20 9
80
4. 95 9
4. 45 9
90
5.30 9
90
4.75 9
100
5.60 0
100
5.00 9
X
Y
11

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