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Question

Question: Cu+ + e–\(\longrightarrow\) Cu, E° = x1 volt ; Cu2+ + 2e–\(\longrightarrow\) Cu, E° = x2 volt, then...

Cu+ + e–\longrightarrow Cu, E° = x1 volt ;

Cu2+ + 2e–\longrightarrow Cu, E° = x2 volt, then for

Cu2+ + e–\longrightarrow Cu+, E° (volt) will be –

A

x1 –2x2

B

x1 + 2x2

C

x1 – x2

D

2x2 – x1

Answer

2x2 – x1

Explanation

Solution

Cu+ + e\longrightarrow Cu , E0 = x1 Volt

Cu2+ + 2e– \longrightarrow Cu , x2 Volt

Cu\longrightarrow Cu+ + e– –x1VotCu2+ + e– \longrightarrowCu+

- 2 × x2 × f + 1 × x1 × f = -1 × E0 × f\text{- 2 }\text{×}\text{ }\text{x}_{2}\text{ }\text{×}\text{ f + 1 }\text{×}\text{ }\text{x}_{1}\text{ }\text{×}\text{ f = -1 }\text{×}\text{ }\text{E}^{0}\text{ }\text{×}\text{ f}E0 = 2x2–x1