In a cell that utilizes the reaction Zn(s)+2H+(aq)→Zn2+(aq)+H2 (g) a

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In a cell that utilizes the reaction

Z n_{(s)} + 2 H^{+} (a q) \to Z n^{2 +} (a q) + H_{2 (g)}

addition of

H_{2} S O_{4}

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 equilibrium to the left

D . Increase the E and shift equilibrium to the left

Answer: Option A
:
A

Z n_{(s)} + 2 H_{(a q)}^{+} ⇌ Z n_{(a q)}^{2 +} + H_{2 (g)}

E_{c e l l} = E_{c e l l}^{\circ} - \frac{.059}{2} l o g \frac{[Z n^{2 +}]}{[H^{+}]^{2}}

When

H_{2} S O_{4}

is added then

[H^{+}]

will increase therefore

E_{c e l l}

will also increases and equilibrium will shift towards right.

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