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  4. The e.m.f. of the cell Tl| Tl+ (0.001 M) | | Cu2+ (0.01 M)|Cu is 0.83 V. The emf of this cell could be increased by

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Q. The e.m.f. of the cell $Tl| Tl^+ (0.001 M) | | Cu^{2+} (0.01 M)|Cu \,is\, 0.83 V$. The emf of this cell could be increased by

Electrochemistry

Solution:

$E_{cell} = E^0 _{cell} + \frac{0.059}{n} log \frac{[Cu^{+2}]}{[Tl^+]^2}$
increasing cone, of $Cu^{+2}$ ions increases the emf.