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प्रश्न
Using the standard electrode potential, predict if the reaction between the following is feasible:
\[\ce{Ag{^+_{(aq)}}}\] and Cu(s)
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उत्तर
The possible reaction between \[\ce{Ag{^+_{(aq)}}}\] + Cu(s) is given by,
\[\ce{2Ag+_{(aq)} + Cu_{(s)} -> 2Ag_{(s)} + Cu^{2+}_{(aq)}}\]
Oxidation half equation: \[\ce{Cu_{(s)} -> Cu{^{2+}_{(aq)}} + 2e-}\]; E° = −0.34 V
Reduction half equation: \[\ce{[Ag{^+_{(aq)}} + e- -> Ag_{(s)}] \times 2}\]; E° = +0.80 V
Overall cell reaction: \[\ce{2Ag{^+_{(aq)}} + Cu_{(s)} -> 2Ag_{(s)} + Cu^{2+}}\]; E° = + 0.46 V
E° positive for the overall reaction is positive. Hence, the reaction between \[\ce{Ag{^+_{(aq)}}}\] and Cu(s) is feasible.
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