2. A sample of primary standard grade K2Cr2O7 (MM = 294.20) weighing 0.2153 g is dissolved, the solution acidified and excess KI added. The liberated I2 requires 44.86 mL of the Na2S2O3 for titration.(a) Write the titration reaction. (b) Calculate the molarity of the titrant solution.

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Answered: A sample of primary standard grade…

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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2. A sample of primary standard grade K₂Cr₂O₇ (MM = 294.20) weighing 0.2153 g is dissolved, the solution acidified and excess KI added. The liberated I₂ requires 44.86 mL of the Na₂S₂O₃ for titration.

(a) Write the titration reaction.

(b) Calculate the molarity of the titrant solution.

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