A chemistry student needs to standardize a fresh solution of sodium hydroxide. She carefully weighs out 400. mg of oxalicacid (H,C204),a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in 250. mL of distilledwater. The student then titrates the oxalic acid solution with her sodium hydroxide solution. When the titration reaches theequivalence point, the student finds she has used 90.3 mL of sodium hydroxide solution.Calculate the molarity of the student's sodium hydroxide solution. Be sure your answer has the correct number of significantdigits.

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ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

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Stoichiometry

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Question

A chemistry student needs to standardize a fresh solution of sodium hydroxide. She carefully weighs out 400. mg of oxalic
acid (H,C204),
a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in 250. mL of distilled
water. The student then titrates the oxalic acid solution with her sodium hydroxide solution. When the titration reaches the
equivalence point, the student finds she has used 90.3 mL of sodium hydroxide solution.
Calculate the molarity of the student's sodium hydroxide solution. Be sure your answer has the correct number of significant
digits.

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