A button cell used in watches function as following. Zn(s) + Ag2O(s) + H2O(l) $\rightleftharpoons$ 2Ag(s) + Zn2+(aq) + 2OH$-$(aq) If half cell potentials are Zn2+(aq) + 2e$-$ $ \to $ Zn(s); Eo = $-$0.76 V Ag2O(s) + H2O(l) + 2e$-$ $ \to $ 2Ag(s) + 2OH$-$(aq), Eo = 0.34 V The cell potential will be

Question

A button cell used in watches function as following.
Zn_(s) + Ag₂O_(s) + H₂O_(l) $\rightleftharpoons$ 2Ag_(s) + Zn²⁺_(aq) + 2OH^$-$_(aq)

If half cell potentials are
Zn²⁺_(aq) + 2e^$-$ $ \to $ Zn_(s); E^o = $-$0.76 V
Ag₂O_(s) + H₂O_(l) + 2e^$-$ $ \to $ 2Ag_(s) + 2OH^$-$_(aq), E^o = 0.34 V

The cell potential will be

0.84 V

1.34 V

1.10 V

0.42 V

Solution

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