Q.

Select the most appropriate Nernst equation for Daniell cell containing Cu2+and Zn2+ions.

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a

E(cu2+/Cu)=E(Cu2+/Cu)o-RTFIn1Cu2+aq

b

E(Zn2+/Zn)=E(Zn2+/Zn)o-RT2FIn1Zn2+aq

c

Ecell=Ecello-RT2FIn Zn2+Cu2+

d

All of the above

answer is C.

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Detailed Solution

In Daniell cell, the electrode potential for concentration of Cu2+ and Zn2+ ions can be written asFor cathodeE(Cu2+/Cu)=E(Cu2+/Cu)o-RT2FIn1Cu2+aqFor anode          E(Zn2+/Zn)=E(Zn2+/Zn)o-RT2FIn Zn2+aq      Ecell=ECu2+/Cu-EZn2+/Zn     Ecell=Ecello-RT2FIn Zn2+Cu2+
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