Redox Reactions And Electrochemistry Ques 604

Question: In a cell that utilises the reaction Zn(s)+2H+(aq)Zn2+(aq)+H2(g) addition of H2SO4 to cathode compartment, will

Options:

A) increase the E and shift equilibrium to the right

B) lower the E and shift equilibrium to the right

C) lower the E and shift equlibrium to the left

D) increase the E and shift equilibrium to the left

Show Answer

Answer:

Correct Answer: A

Solution:

[a] Zn(s)+2H+(aq)Zn2+(aq)+H2(g)

Ecell=Ecell0.0592log[Zn2+][H2][H+]2

Addition of H2SO4 will increase [H+] and Ecell will also increase and the equilibrium will shift towards RHS



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