Following reactions are taking place in a Galvanic cell- Zn- Zn2-2e- Ag-e- AgWhich of the given representations is the correct method of depicting the cell-

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Electrochemical Cells, Galvanic Cells

Following rea...

Question

Following reactions are taking place in a Galvanic cell, $Z n \to Z n^{2 +} + 2 e^{-}; A g^{+} + e^{-} \to A g$
Which of the given representations is the correct method of depicting the cell?

Z n_{(s)} | Z n_{(a q)}^{2 +} | | A g_{(a q)}^{+} | A g_{(s)}

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Z n^{2 +} | Z n | | A g | A g^{+}

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Z n_{(a q)} | Z n_{(s)}^{2 +} | | A g_{(s)}^{+} | A g_{(a q)}

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Z n_{(s)} | A g_{(a q)}^{+} | | Z n_{(a q)}^{2 +} | A g_{(s)}

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Solution

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△ 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

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

Which of the following reactions actually take place

The cell representation of the given reactions is:

Zn(s) + 2Ag⁺ → Zn²⁺ + 2Ag(s)

The standard reducation potentials of

$Z n^{2 +} | Z n, C u^{2 +} | C u$ and $A g^{+} | A g$

are respectively -0.76, 0.34 and 0.8 V. The following cells were constructed.

a) $Z n | Z n^{2 +} | | C u^{2 +} | C u$

b) $Z n | Z n^{2 +} | | A g^{+} | A g$

c) $C u | C u^{2 +} | | A g^{+} | A g$

What is the correct order $E {^{0}}_{c e l l}$ of these cells?

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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