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Application of Electrolysis

Which of the ...

Question

Which of the following reaction takes place at the cathode during electroplating of metal with silver using sodium argentocyanide as an electrolyte?

{A g}^{+} + e^{_} ⟶ A g

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A g ⟶ {A g}^{_} + e^{_}

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2 {A g}^{+} + e^{_} ⟶ A g

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A g^{+} ⟶ {A g}^{_} + e^{_}

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Solution

The correct option is D ${A g}^{+} + e^{_} ⟶ A g$
In electroplating with silver,
reaction at cathode:
$A g^{+} + e^{-} \to A g$ .

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Similar questions

E^{\circ}

2 A g + Z n^{2 +} \to 2 A g^{+} + Z n

E_{A g^{+} / A g}^{\circ} = 0.80 V, E_{Z n^{2 +} / Z n}^{\circ} = - 0.76 V

E^{\circ}

298 K

A g (N H_{3})_{2}^{+} + e^{-} \to A g + 2 N H_{3}

A g^{+} + e^{-} \to A g; E_{A g^{+} / A g}^{\circ} = 0.80 V

A g (N H_{3})_{2}^{+} ⇌ A g^{+} + 2 N H_{3}; K = 6 \times 10^{- 8}

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

Which of the following reactions actually take place

Match the following:

List-I

A) Electrolysis of aq. sol. of $N a_{2} S O_{4}$ by using inert electrodes.

B) Electrolysis of 50% $H_{2} S O_{4}$ using Pt electrodes.

C) Electrolysis of Aq. sol. of $A g N O_{3}$ using inert electrodes.

D) Electrolysis of aq. $A g N O_{3}$ using silver electrodes.

List-II

1) Ag at cathode $O_{2}$ at anode

2) $H_{2}$ at cathode $O_{2}$ at anode

3) $H_{2}$ at cathode $H_{2} S_{2} O_{8}$ at anode

4) $A g^{+} + e^{-} \to A g$
$A g \to A g^{+} + e^{-}$

E^{\circ}

△ G^{\circ}

F e^{2 +} + A g^{+} \to F e^{3 +} + A g

E_{A g^{+} / A g}^{\circ} = 0.80 v o l t

E_{P t / F e^{3 +}, F e^{2 +}}^{\circ} = 0.77 v o l t

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