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Electrochemistry
Question
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State Faraday's first law of electrolysis. How much charge in terms of Faraday is required for the reduction of 1 mol of Cu2+ to Cu.

Answer

Faraday's first law of electrolysis states that 'the amount of chemical reaction which occurs at any electrode during electrolysis by a current is proportional to the quantity of electricity passed through the electrolytic solution or melt'.

 

The reduction of one mol of Cu2+ to Cu can be represented as:


Cu2++ 2e----->  Cu


Since, in this reaction, there are two moles of electrons involved, so the amount of charge required is 2F.

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