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JEE PYQ: Electrochemistry Question 21

Question 21 - 2020 (07 Jan Shift 1)

Given that the standard potentials ($E^0$) of $\text{Cu}^{2+}/\text{Cu}$ and $\text{Cu}^+/\text{Cu}$ are 0.34 V and 0.522 V respectively, the $E^0$ of $\text{Cu}^{2+}/\text{Cu}^+$ is:

(1) +0.182 V

(2) +0.158 V

(3) -0.182 V

(4) -0.158 V

Show Answer

Answer: (2) +0.158 V

Solution

Using Gibbs energy: $E^0 = 2(0.34) - 0.522 = 0.158$ V.


Learning Progress: Step 21 of 37 in this series