A group of students were trying to experimentally determine the density of an unknown liquid. They developed a standard technique for measuring density by recording the mass of a liquid using an analytical balance. The volume of the liquids were accurately measured using a serological pipette and was recorded to be 5.00 mL for each trial. The students were able to collect the following data: LIQUID SAMPLE Hexane Acetone. Ethanol unknown Trial 1 (mass in grams) 3.281 3.921 3.912 3.914 Trial 2 (mass in grams) 3.284 3.923 3.911 3.911 What is the percent error of the density for ethanol? Trial 3 (mass in grams) 3.279 3.947 3.913 3.910 Theoretical Density 0.655 g/mL 0.784 g/ml 0.789 g/ml
A group of students were trying to experimentally determine the density of an unknown liquid. They developed a standard technique for measuring density by recording the mass of a liquid using an analytical balance. The volume of the liquids were accurately measured using a serological pipette and was recorded to be 5.00 mL for each trial. The students were able to collect the following data: LIQUID SAMPLE Hexane Acetone. Ethanol unknown Trial 1 (mass in grams) 3.281 3.921 3.912 3.914 Trial 2 (mass in grams) 3.284 3.923 3.911 3.911 What is the percent error of the density for ethanol? Trial 3 (mass in grams) 3.279 3.947 3.913 3.910 Theoretical Density 0.655 g/mL 0.784 g/ml 0.789 g/ml
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter1: Basic Concepts Of Chemistry
Section: Chapter Questions
Problem 2RCYU: A student checked the accuracy of two standard top-loading balances by testing them with a standard...
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Transcribed Image Text:A group of students were trying to experimentally determine the density of an unknown liquid. They developed a standard technique for measuring density by
recording the mass of a liquid using an analytical balance. The volume of the liquids were accurately measured using a serological pipette and was recorded
to be 5.00 mL for each trial. The students were able to collect the following data:
LIQUID
SAMPLE
Hexane
Acetone
Ethanol
unknown
Trial 1 (mass in
grams)
0.000200%
0.0837%
3.281
3.921
3.912
3.914
Trial 2 (mass in
grams)
3.284
3.923
3.911
3.911
What is the percent error of the density for ethanol?
08.87%
00200%
Trial 3 (mass in
grams)
3.279
3.947
3.913
3.910
Theoretical
Density
0.655 g/mL
0.784 g/mL
0.789 g/ml
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