What is the change in potential of following cell Zn_ (s) ,| ,Zn^ 2+ ,(1 ,M) ,|| ,Pb^ 2+ ,(1 ,M) ,| ,Pb_ (s) , if concentration of ions at anode is increased 10 times?

MHT CET 2022 Chemistry question

What is the change in potential of following cell \mathrm{Zn_{(s)}\,|\,Zn^{2+}\,(1\,M)\,||\,Pb^{2+}\,(1\,M)\,|\,Pb_{(s)}}, if concentration of ions at anode is increased 10 times?

(A)Decreases by 0.0296 voltCorrect
(B)Increases by 10 volt
(C)Decreases by 10 volt
(D)Increases by 0.0296 volt

Answer: (A)

Solution

The anode (oxidation) half-cell is , so the cell reaction is \mathrm{Zn + Pb^{2+} \to Zn^{2+} + Pb} with . The Nernst equation at 298 K is . Initially both concentrations are 1 M,

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Question ID VK-094151