The iodine produced when excess of KI was added to the solution containing 0.1259 g K2Cr2O7 required a 41.26 mL titration with Na2S2O3 required a 41.26 mL titration with Na2S2O3.P.S. Be able to answer numbers 1 and 2 ONLY.1. Determine if it is basic or acidic and write the balance redox reaction for the reaction of dichromate ion with iodide ion in acidic medium.Unbalance equation: Cr2O72- (aq) + I- (aq) → Cr3+ + I2 (aq)2. Determine if it is basic or acidic and write the balance redox reaction of iodine with sodium thiosulfate in acidic medium.Unbalance equation: S2O3 2- (aq) + I2 (aq) → S4O6 2- (aq) + I- (aq)3. (i) What are the oxidizing agents in #1 and #2? (ii) What is the stoichiometric ratio between dichromate and thiosulfate?4. Calculate the molar concentration of the thiosulfate solution.

Given: Weight of K2Cr2O7 = 0.1259 g Volume of Na2S2O8 = 41.26 mL The given reactions produce excess…

Answered: he iodine produced when excess of KI…

Chemistry

10th Edition

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

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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The iodine produced when excess of KI was added to the solution containing 0.1259 g K₂Cr₂O₇ required a 41.26 mL titration with Na₂S₂O₃ required a 41.26 mL titration with Na₂S₂O₃.

P.S. Be able to answer numbers 1 and 2 ONLY.

1. Determine if it is basic or acidic and write the balance redox reaction for the reaction of dichromate ion with iodide ion in acidic medium.

Unbalance equation: Cr₂O₇^2- (aq) + I^- (aq) → Cr₃+ + I₂ (aq)

2. Determine if it is basic or acidic and write the balance redox reaction of iodine with sodium thiosulfate in acidic medium.

Unbalance equation: S₂O₃ ^2- (aq) + I₂ (aq) → S₄O₆ ^2- (aq) + I^- (aq)

3. (i) What are the oxidizing agents in #1 and #2? (ii) What is the stoichiometric ratio between dichromate and thiosulfate?

4. Calculate the molar concentration of the thiosulfate solution.

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