Chemistry & Chemical Reactivity
10th Edition
ISBN: 9781337399074
Author: John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher: Cengage Learning
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Experiment Of Denisty
Using a 10-mL graduated cylinder, measure the following volumes of water 3 different trails:
a. 6.0 mL- Trail 1) 6.1 mL, Trail 2) 6.2 mL, and Trail 3) 6.0 mL
b. 70.0 mL (note: you will have to refill the graduated cylinder 7 times to obtain
the 70.0 mL)- Trail 1)68.0 mL, Trail 2)69.9 mL, Trail 3) 71.5 mL
Repeat parts a and b using a 100-mL graduated cylinder. Part a) Trail 1) 6.9 mL, Trail 2)6.1 mL, Trail 3) 5.9 mL and Part b) Trail 1)70.0 mL, Trail 2)71.0 mL, Trail 3)69.0
Answer from the experiment you see above
a) What graduated cylinder worked best for each volume? What data did you get that
supports your answer?
b) Look at the percent errors you calculated. Were there any significant differences that
you noticed? What may be causing the differences?
c) For this scenario, a group determined the 100 mL graduated cylinder was more accurate for both the small and large volumes after one trial. Do you believe one trial will give accurate results? How many trials do you think you would need to run to get reliable data for this scenario?
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