Redox Reactions And Electrochemistry Ques 212

Question: For the electrochemical cell, M|M+||X−|X, E∘(M+|M) =0.44 V E∘(X|X−)=0.33 V From this data, one can deduce that [Pb.CET 2004]

Options:

A) E∘cell=−0.77,V

B) M++X−→M+X is the spontaneous reaction

C) M+X→M++X− is the spontaneous reaction

D) E∘cell=.77 V

Show Answer

Answer:

Correct Answer: B

Solution:

For M++X−→M+X
Ecell0=ECathode0+EAnode0

=0.44−0.33=+0.11 V

Since Ecell0=(+) 0.11 V is positive hence this reaction should be spontaneous.

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