Answered: , solutions of hydrogen peroxide, H2O2,…

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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In the reaction being studied in this lab, solutions of hydrogen peroxide, H2O2, and potassium permanganate, KMnO4, will be combined in acidic solution. KMnO4, will be used as the titrant to analyze the concentration of hydrogen peroxide in a drugstore bottle. The KMnO4 solution is purple in color, as it is added to the hydrogen peroxide solution, it reacts with the H2O2 to produce colorless Mn2+, and thus the color will fade in the flask. When all the H2O2has been used up, the last drop of potassium permanganate that is added will keep its color. The endpoint of the titration is the point at which the last drop of KMnO4 added to the solution causes it to turn pink. The balanced equation for the reaction in this lab is: 2MnO4‒(aq) + 5H2O2(aq) + 6H+(aq) à 2Mn2+(aq) + 5O2(g) + 8H2O(l) 1. What is the titrant in this lab? 2. What is the analyte in this lab? 3. The balanced equation for the reaction in this lab is: 2MnO4‒(aq) + 5H2O2(aq) + 6H+(aq) à 2Mn2+(aq) + 5O2(g) + 8H2O(l) a. How many electrons are transferred in this reaction? b. What species is being oxidized? What species is being reduced?

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