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: 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?

General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter19: Electrochemistry
Section: Chapter Questions
Problem 19.137QP: Which of the following reactions occur spontaneously as written, with the production of a measurable...
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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:

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?

Cr20," (aq)
+ 14H* (ag)+ 12e¯ → 2Cr(s) + 7H20
Transcribed Image Text:Cr20," (aq) + 14H* (ag)+ 12e¯ → 2Cr(s) + 7H20
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