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?
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?
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Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter21: Chemistry Of The Main-group Elements
Section: Chapter Questions
Problem 21.136QP
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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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F97cdfc8e-0c93-4975-8824-a81a8199c67a%2F08e1cd76-6af4-4bbf-aaf3-ea5aa9cb98db%2F060uh0q_processed.png&w=3840&q=75)
Transcribed Image Text:Cr20," (aq)
+ 14H* (ag)+ 12e¯ → 2Cr(s) + 7H20
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