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:Cr2O7+(aq) + 14H+(aq) + 12e- -> 2Cr(s)+7H2Oa) How many hours would it take to completely convert215mL of 1.25M K2Cr2O7 to elemental chromium?b) How many kilowatt-hours of electrical energy arerequired to plate 1.00 g of chromium?

The chemical reaction corresponding to electroplating of Chromium is given as:Cr2O72- (aq) + 14 H+…

Answered: Chromium can be electroplated from…

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter18: Electrochemistry

Section: Chapter Questions

Problem 18.104QE

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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:

Cr₂O₇⁺_(aq) + 14H⁺_(aq) + 12e^- -> 2Cr_(s)+7H₂O

a) How many hours would it take to completely convert
215mL of 1.25M K2Cr2O7 to elemental chromium?

b) How many kilowatt-hours of electrical energy are
required to plate 1.00 g of chromium?

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