At 25oC- the standard oxidation potential of Zn and Ag in water are- Zns- Zn-2aq-2e- E0-0-76V and Ags- Ag-aq-e- E0-0-80V- Which of the following reaction actually takes place-

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Electrochemical Series

At 25oC, th...

Question

At $25^{o} C$ , the standard oxidation potential of $Z n$ and $A g$ in water are:

$Z n (s) \to Z n^{+ 2} (a q) + 2 e^{-}, E^{0} = 0.76 V$

and $A g (s) \to A g^{+} (a q) + e^{-}, E^{0} = - 0.80 V$ .

Which of the following reaction actually takes place?

Z n^{2 +} (a q) + 2 A g (s) \to 2 A g^{+} (a q) + Z n (s)

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Z n (s) + 2 A g^{+} (a q) \to Z n^{2 +} (a q) + 2 A g (s)

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Z n^{2 +} (a q) + 2 A g^{+} (a q) \to Z n (s) + 2 A g (s)

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Z n (s) + A g (s) \to Z n^{2 +} (a q) + A g^{+} (a q)

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The standard oxidation potential of zinc and silver in water at 298 K are

Which of the following reactions actually take place

△ G^{\circ}

Z n (s) + A g_{2} O (s) + H_{2} O (l) ⇌ Z n^{2 +} (a q) + 2 A g (s) + 2 O H^{-} (a q)

E_{A g^{+} / A g}^{\circ} = + 0.80 V

E_{Z n^{2 +} / Z N}^{\circ} = - 0.76 V

Z n (s) + A g_{2} O (s) + H_{2} O (l) ⇌ 2 A g (s) + Z n^{2 +} (a q) + 2 O H^{-} (a q)

Z n^{2 +} (a q) + 2 e \to Z n (s); E^{0} = - 0.76 V

A g_{2} O (s) + H_{2} O (l) 2 e \to 2 A g (s) + 2 O H^{-} (a q), E^{0} = 0.34 V

Z n (s) + A g_{2} O (s) + H_{2} O (l) ⇌ 2 A g (s) + Z n^{2 +} (a q) + 2 O H^{-} (a q)

Z n^{2 +} (a q) + 2 e^{-} \to Z n (s); E^{\circ} = - 0.76 V

A g_{2} O (s) + H_{2} O (l) + 2 e^{-} \to 2 A g (s) + 2 O H^{-} (a q), E^{\circ} = 0.34 V

Δ_{r} G^{o}

Z n_{(s)} + A g_{2} O_{(s)} + H_{2} O_{(l)} \to Z n_{(a q)}^{2 +} + 2 A g_{(s)} + 2 O H_{(a q)}^{-}

[E_{A g_{2} O / A g}^{o} = 0.344 V, E_{Z n^{2 +} / Z n}^{o} = - 0.76 V]

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