Chromium plating is applied by electrolysis to objects suspended in a dichromate

Transcribed Image Text: 9. Chromium plating is applied by electrolysis to objects suspended in a dichromate
solution, according to this half-reaction:
Cr20,2 (aq) + H*(aq) + e¯ -> Cr(s) + H20(1I)
(unbalanced)
How long (in hours) would it take to apply a chromium plating 0.010 mm thick to a car
bumper with a surface area of 0.32 m2 in an electrolytic cell carrying a current of 25.0
A and assuming electrolysis is 88% efficient? The density of chromium is 7.19 g/cm3.
AW of Cr = 52.
O A. 0.54 h
В. 1.25 h
O C. 2.42 h
D. 3.23 h

-25-


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