First slide

Faraday's Laws

Question

How many minutes will it take to plate out 52 g of Cr from a Cr₂(SO₄)₃ solution using a current of 9.65 A? (Atomic weight : Cr : 52.0)

Easy

A

200
B

50 g
C

100
D

103

Solution

$5 .2 = \frac{52}{3} \times \frac{9 .65}{96, 500} \times t (\sec .),$
t(sec) = 3000
t(min) = 50

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