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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