MHT CET 2025 Chemistry question
The standard emf for cell, \ominus\ \mathrm{Cd_{(s)}\,|\,Cd^{+2}(1\,M)\,||\,Cu^{+2}(1\,M)\,|\,Cu_{(s)}}\ \oplus is 0.74 V. If concentration of and decreases by 10 times at 298 K. Calculate emf of cell.
Answer: (D)
Solution
Cell reaction: \mathrm{Cd_{(s)} + Cu^{2+} \rightarrow Cd^{2+} + Cu_{(s)}}, . Nernst equation: . Both concentrations fall ten-fold, from 1 M to 0.1 M, so the ratio $ = =
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