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  • How many grams of cobalt metal will be deposited when a solution of cobalt(II) chloride is electrolysed with a current of 10 A for 109 min?

How many grams of cobalt metal will be deposited when a solution of cobalt(II) chloride is electrolysed with a current of 10 A for 109 min?

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Faraday's law of electrolysis -

The mass of any substance deposited or dissolved at an electrode during electrolysis is directly proportional to the quantity of electricity passed through the solution.
 

W=ZIT

W = mass of electrolyte deposited 

Z = electrochemical eqvivalent = E/96500

I = current  and T is time 

w = (E/96500)*10 *109*60              {  E = 59/2 for Cobalt}

w = 20g 

 

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manish

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