The ethyl mercaptan (C2H5SH, 62.13 g/mol) concentration in a mixture was determined by shaking a 1.534 g sample with 50.0 mL of 0.01293 M I2 in a tightly stoppered flask: 2 C2H5SH (aq) + I2 (aq) --> C4H10S2 (aq) + 2 I- (aq) + 2 H+ (aq) The excess I2 was back-titrated with 15.72 mL of 0.01425 M Na2S2O3: I2 (aq) + 2 S2O32- (aq) --> 2 I- (aq) + S4O62- (aq) Calculate the percentage of ethyl mercaptan in the sample (3 sf)
The ethyl mercaptan (C2H5SH, 62.13 g/mol) concentration in a mixture was determined by shaking a 1.534 g sample with 50.0 mL of 0.01293 M I2 in a tightly stoppered flask: 2 C2H5SH (aq) + I2 (aq) --> C4H10S2 (aq) + 2 I- (aq) + 2 H+ (aq) The excess I2 was back-titrated with 15.72 mL of 0.01425 M Na2S2O3: I2 (aq) + 2 S2O32- (aq) --> 2 I- (aq) + S4O62- (aq) Calculate the percentage of ethyl mercaptan in the sample (3 sf)
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter13: The Chemistry Of Solutes And Solutions
Section: Chapter Questions
Problem 95QRT
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The ethyl mercaptan (C2H5SH, 62.13 g/mol) concentration in a mixture was determined by shaking a 1.534 g sample with 50.0 mL of 0.01293 M I2 in a tightly stoppered flask:
2 C2H5SH (aq) + I2 (aq) --> C4H10S2 (aq) + 2 I- (aq) + 2 H+ (aq)
The excess I2 was back-titrated with 15.72 mL of 0.01425 M Na2S2O3:
I2 (aq) + 2 S2O32- (aq) --> 2 I- (aq) + S4O62- (aq)
Calculate the percentage of ethyl mercaptan in the sample (3 sf)
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