Student A weighed a 6.421-g sample known to contain ClO4- and Cl-. The sample wasdissolved in water to give a 200.0 mL of solution. An aliquot of 75.00 mL volume wastaken and then treated with vanadium (III) sulfate to reduce all the ClO4- to Cl- according to the reaction: ClO4- + 4V2(SO4)3 + 4H2O → Cl-+ 12SO42-+ 8VO2+ + 8H+ Titration of this reduced sample required 40.00 mL of 0.0765 M AgNO3 solution. Another75.00 mL aliquot required 14.00 mL of 0.0765 M AgNO3 to titrate Cl-. Calculate the percent(w/w) of ClO4- (MM = 99.45) and Cl- (MM = 35.45) in the sample.
Student A weighed a 6.421-g sample known to contain ClO4- and Cl-. The sample wasdissolved in water to give a 200.0 mL of solution. An aliquot of 75.00 mL volume wastaken and then treated with vanadium (III) sulfate to reduce all the ClO4- to Cl- according to the reaction: ClO4- + 4V2(SO4)3 + 4H2O → Cl-+ 12SO42-+ 8VO2+ + 8H+ Titration of this reduced sample required 40.00 mL of 0.0765 M AgNO3 solution. Another75.00 mL aliquot required 14.00 mL of 0.0765 M AgNO3 to titrate Cl-. Calculate the percent(w/w) of ClO4- (MM = 99.45) and Cl- (MM = 35.45) in the sample.
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter4: Reactions In Aqueous Solution
Section: Chapter Questions
Problem 57QAP: A sample of limestone weighing 1.005 g is dissolved in 75.00 mL of 0.2500 M hydrochloric acid. The...
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Student A weighed a 6.421-g sample known to contain ClO4- and Cl-. The sample wasdissolved in water to give a 200.0 mL of solution. An aliquot of 75.00 mL volume wastaken and then treated with vanadium (III) sulfate to reduce all the ClO4- to Cl- according to the reaction:
ClO4- + 4V2(SO4)3 + 4H2O → Cl-+ 12SO42-+ 8VO2+ + 8H+
Titration of this reduced sample required 40.00 mL of 0.0765 M AgNO3 solution. Another75.00 mL aliquot required 14.00 mL of 0.0765 M AgNO3 to titrate Cl-. Calculate the percent(w/w) of ClO4- (MM = 99.45) and Cl- (MM = 35.45) in the sample.
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