what is meant by the term electrochemiacal cell ? given its mechanics by considering zn-cuso4 reaction 

Asked by Aakrati Gawande | 26th Mar, 2014, 05:14: PM

Expert Answer:

It is a device used to convert chemical energy into electrical energy.
 

Consider the following example of piece of zinc (Zn) metal placed in a solution of copper sulfate (CuSO4), where Zn is oxidized to Zn+2 and Cu+2 is reduced to Cu.

 

Redox equation:

Zn(s) + Cu+2(aq) → Zn+2(aq) + Cu(s)

 

Anode reaction (Zn electrode): Zn → Zn+2 (aq) + 2e-

Cathode reaction (Cu electrode): Cu+2(aq) + 2e- → Cu(s)

 

Answered by  | 27th Mar, 2014, 11:48: AM

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