MHT CET · Chemistry · Electrochemistry
For the following cell, standard potential of copper electrode in \(0.337 \mathrm{~V}\) and standard cell potential is \(0.463 \mathrm{~V}\) \(\mathrm{Cu}\left|\mathrm{Cu}^{2+}(1 \mathrm{M}) \| \mathrm{Ag}^{+}(1 \mathrm{M})\right| \mathrm{Ag}\)
What is the standard potential of silver electrode?
- A \(-0.126 \mathrm{~V}\)
- B \(0.800 \mathrm{~V}\)
- C \(-0.463 \mathrm{~V}\)
- D \(0.126 \mathrm{~V}\)
Answer & Solution
Correct Answer
(B) \(0.800 \mathrm{~V}\)
Step-by-step Solution
Detailed explanation
\(\mathrm{E}_{\mathrm{cell}}^{0}=0.463 \mathrm{~V}, \quad \mathrm{E}_{\mathrm{Cu}}^{0}=0.337 \mathrm{~V}\)
\(\mathrm{E}_{\mathrm{cell}}^{0}=\mathrm{E}_{\mathrm{Ag}}^{0}-\mathrm{E}_{\mathrm{Cu}}^{0}\)
\(\therefore \mathrm{E}_{\mathrm{Ag}}^{0}=\mathrm{E}_{\mathrm{cell}}^{0}+\mathrm{E}_{\mathrm{Cu}}^{0}=0.463+0.337=0.800 \mathrm{~V}\)
\(\mathrm{E}_{\mathrm{cell}}^{0}=\mathrm{E}_{\mathrm{Ag}}^{0}-\mathrm{E}_{\mathrm{Cu}}^{0}\)
\(\therefore \mathrm{E}_{\mathrm{Ag}}^{0}=\mathrm{E}_{\mathrm{cell}}^{0}+\mathrm{E}_{\mathrm{Cu}}^{0}=0.463+0.337=0.800 \mathrm{~V}\)
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