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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answer is 2.

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Detailed Solution

W=ItE96500 =10×109×60×5996500×2=19.99≈20
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