Cerium(IV) sulfate in acidic solution is used to titrate a solution of arsenous acid, with which it reacts according to2Ce4+(aq) + H3AsO3(aq)+5H2O(l)2Ce3+(aq) + H3AsO4(aq)+2H3O+(aq)A cerium(IV) sulfate solution is prepared by dissolving 49.60 g of Ce(SO4)2 in water and diluting to a total volume of 1.000 L. A total of 17.83 mL of this solution is required to reach the endpoint in a titration of a 100.0-mL sample containing H3AsO3(aq). Determine the concentration of H3AsO3 in the original solution.

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Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter18: Electrochemistry

Section: Chapter Questions

Problem 18.103QE

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Cerium(IV) sulfate in acidic solution is used to titrate a solution of arsenous acid, with which it reacts according to

2Ce⁴⁺(aq)

H₃AsO₃(aq)+5H₂O(l)2Ce³⁺(aq)

H₃AsO₄(aq)+2H₃O⁺(aq)

A cerium(IV) sulfate solution is prepared by dissolving 49.60 g of Ce(SO₄)₂ in water and diluting to a total volume of 1.000 L. A total of 17.83 mL of this solution is required to reach the endpoint in a titration of a 100.0-mL sample containing H₃AsO₃(aq). Determine the concentration of H₃AsO₃ in the original solution.

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