COMEDK · Chemistry · 18. Electrochemistry

What is the standard electrode potential at 298 K for the reaction: \(\mathrm{Cu}^{2+}+1 \mathrm{e}-\rightarrow \mathrm{Cu}^{+1}\) ?
Given: \(\mathrm{E}_0 \mathrm{Cu}^{+1} / \mathrm{Cu}=0.5 \mathrm{~V} \quad \& \quad \mathrm{E}_0 \mathrm{Cu}^{+2} / \mathrm{Cu}=0.335 \mathrm{~V}\)

A 0.34 V
B 0.17 V
C 0.492 V
D 0.410 V

Verified Solution

Answer & Solution

Correct Answer

(B) 0.17 V

Step-by-step Solution

Detailed explanation

The standard electrode potential for the reaction \(\mathrm{Cu}^{2+} + \mathrm{e}^{-} \rightarrow \mathrm{Cu}^{+}\) can be determined using the Gibbs free energy change \(\Delta G^{\circ} = -nFE^{\circ}\). For the reaction…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Explore more questions on app

From COMEDK

Experiment No.	Initial concentration of \(Cl_2\) (M)	Initial concentration of NO (M)	Initial reaction rate (M/min)
I	0.15	0.15	0.60
II	0.30	0.15	1.20
III	0.15	0.30	2.40
IV	0.25	0.25	2.78

Explore more questions on app

What is the standard electrode potential at 298 K for the reaction: \(\mathrm{Cu}^{2+}+1 \mathrm{e}-\rightarrow \mathrm{Cu}^{+1}\) ?Given: \(\mathrm{E}_0 \mathrm{Cu}^{+1} / \mathrm{Cu}=0.5 \mathrm{~V} \quad \& \quad \mathrm{E}_0 \mathrm{Cu}^{+2} / \mathrm{Cu}=0.335 \mathrm{~V}\)

Step-by-step Solution

What is the standard electrode potential at 298 K for the reaction: \(\mathrm{Cu}^{2+}+1 \mathrm{e}-\rightarrow \mathrm{Cu}^{+1}\) ?
Given: \(\mathrm{E}_0 \mathrm{Cu}^{+1} / \mathrm{Cu}=0.5 \mathrm{~V} \quad \& \quad \mathrm{E}_0 \mathrm{Cu}^{+2} / \mathrm{Cu}=0.335 \mathrm{~V}\)