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Redox Reactions

Question
CBSEENCH11006791

Write down the half reaction and net reaction for the Daniell cell.
right enclose Zn left parenthesis straight s right parenthesis end enclose space Zn to the power of 2 plus end exponent left parenthesis aq right parenthesis vertical line vertical line space space Cu to the power of 2 plus end exponent left parenthesis aq right parenthesis space left parenthesis 1 space straight M right parenthesis space Cu left parenthesis straight s right parenthesis.

Solution

The half reaction of given cell is,
(i) Oxidation half-reaction:
                 Zn left parenthesis straight s right parenthesis space space space rightwards arrow space space space space Zn to the power of 2 plus end exponent left parenthesis aq right parenthesis space plus space 2 straight e to the power of minus space space space space space space space... left parenthesis 1 right parenthesis
(ii) Reduction half-reaction:
       Cu to the power of 2 plus end exponent left parenthesis aq right parenthesis space plus space 2 straight e to the power of minus space space rightwards arrow space space space Cu left parenthesis straight s right parenthesis space space space space space space... left parenthesis 2 right parenthesis
Net reaction {By adding (1) and (2)}
Zn left parenthesis straight s right parenthesis space plus space Cu to the power of 2 plus end exponent left parenthesis aq right parenthesis space space rightwards arrow space space space Zn to the power of 2 plus end exponent left parenthesis aq right parenthesis space plus space Cu left parenthesis straight s right parenthesis