Obtaining the freezing point Depression of the sample in ice bath with one trail below:The solvent picked will be of water: Urea (CO(NH2)2 , 60.06 g/mol) Measurement: the empty 100 graduated cylinder is 144.422g; temp vs. solvent with water is weighed at 15.136g. The tempeture was -7 degrees, the results were -1.5 celsius. The urea weighed with H2O is 15.088g. Address the percent error:a) How far off were they and what might be causing any differences? Be more specific than simply stating “human error”. b) Based on the percent error, do you consider the experimental methodreliable? Explain. c) Do you think you could have identified an unknown solid using thismethod?
Obtaining the freezing point Depression of the sample in ice bath with one trail below:The solvent picked will be of water: Urea (CO(NH2)2 , 60.06 g/mol) Measurement: the empty 100 graduated cylinder is 144.422g; temp vs. solvent with water is weighed at 15.136g. The tempeture was -7 degrees, the results were -1.5 celsius. The urea weighed with H2O is 15.088g. Address the percent error:a) How far off were they and what might be causing any differences? Be more specific than simply stating “human error”. b) Based on the percent error, do you consider the experimental methodreliable? Explain. c) Do you think you could have identified an unknown solid using thismethod?
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter11: Properties Of Solutions
Section: Chapter Questions
Problem 132CP: A forensic chemist is given a white solid that is suspected of being pure cocaine (C17H21NO4, molar...
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Obtaining the freezing point Depression of the sample in ice bath with one trail below:The solvent picked will be of water: Urea (CO(NH2)2 , 60.06 g/mol) Measurement: the empty 100 graduated cylinder is 144.422g; temp vs. solvent with water is weighed at 15.136g. The tempeture was -7 degrees, the results were -1.5 celsius. The urea weighed with H2O is 15.088g.
Address the percent error:
a) How far off were they and what might be causing any differences? Be more specific than simply stating “human error”.
b) Based on the percent error, do you consider the experimental method
reliable? Explain.
c) Do you think you could have identified an unknown solid using this
method?
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