6) Chromium can be electroplated from aqueous potassium dichromate, with thereduction shown below. If a current of 6.0A and a voltage of 4.5V are used:Cr20,2-+ 14H* (ag)+ 12e¯ → 2Cr(s) + 7H20(ад)a) How many hours would it take to completely convert215mL of 1.25M K,Cr,O, to elemental chromium?b) How many kilowatt-hours of electrical energy arerequired to plate 1.00 g of chromium?

Given data set: Molarity of K2Cr2O7 = 1.25 M Volume of K2Cr2O7 = 215 ml = 0.215 L Thus, Moles of…

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14H

Chemistry

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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

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

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Question

6) Chromium can be electroplated from aqueous potassium dichromate, with the
reduction shown below. If a current of 6.0A and a voltage of 4.5V are used:
Cr20,2-
+ 14H* (ag)+ 12e¯ → 2Cr(s) + 7H20
(ад)
a) How many hours would it take to completely convert
215mL of 1.25M K,Cr,O, to elemental chromium?
b) How many kilowatt-hours of electrical energy are
required to plate 1.00 g of chromium?

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