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Question

0.2864g of Cu was deposited on passage of a current of 0.5 ampere for 30 minutes through a solution of copper sulphate. What is the electrochemical equivalent of copper?

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Solution

Given that,

Weight of copper =0.2864 g

Current =0.5 ampere

Time =30 mint

Now we get

Quantity of charge passed

0.5×30×60=900 coulomb

So, 900 coulomb Deposit copper =0.2864g

We know that

1 faraday=96500 coulomb

Thus,

96500 coulomb deposit copper=0.2864900×96500=30.78 g

Hence, Equivalent mass of copper =30.78g


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