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  • I need help with How many grams of cobalt metal will be deposited when a solution of cobalt (II) chloride is electrolyzed with a current of 10 amperers for 109 minutes (1 Faraday=96,50 C; Atomic mass of Co=59 u)

How many grams of cobalt metal will be deposited when a solution of cobalt (II) chloride is electrolyzed with a current of 10 amperers for 109 minutes (1 Faraday=96,50 C; Atomic mass of Co=59 u)

  • Option 1)

    0.66

  • Option 2)

    4.0

  • Option 3)

    20.0

  • Option 4)

    40.0

 

Answers (1)

best_answer

 

Faraday's first law of electrolysis -

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

- wherein

W\alpha\ Q

W = Z I t

Z = mass of electrolyte get deposited

Z = electro chemical equivalent

 

 W = W = \frac{ItE}{96,500}=\frac{10\times109\times60\times59}{96500\times2}=20


Option 1)

0.66

incorrect

Option 2)

4.0

incorrect

Option 3)

20.0

correct

Option 4)

40.0

incorrect

Posted by

Plabita

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