First slide

Faraday's Laws

Question

How many gram of cobalt metal will be deposited when a solution of cobalt(II) chloride is electrolyzed with a current of 10 amperes for 109 minutes (1 Faraday=96,500 C Atomic mass of Co=59 u)

Moderate

Solution

$W = \frac{ItE}{96500} = \frac{10 \times 109 \times 60 \times 59}{96500 \times 2} = 19.99 \approx 20$

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