Q.

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)

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a

0.66

b

20.0

c

40.0

d

4.0

answer is B.

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Detailed Solution

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W=ItE96500 =10×109×60×5996500×2=19.9920 

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