Although Cu- disproportionates in aqueous solution as 2Cu-aq - Cus - Cu2-aq- Write down a reaction in which disproportionation is reversed-

The correct option is A Cu(s) + Cu^2+ (aq) + 2Cl^ → CuCl(s) Although Cu^+ disproportionates in aqueous solution as 2Cu^+(aq) → Cu(s) + Cu^2+( ...

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Standard XII

Chemistry

Types of Redox Reactions

Although Cu...

Question

Although $C u^{+}$ disproportionates in aqueous solution as $2 C u^{+} (a q) \to C u (s) + C u^{2 +} (a q)$ . Write down a reaction in which disproportionation is reversed.

C u (s) + C u^{2 +} (a q) + 2 C l^{-} \to C u C l (s)

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C u (l) + C u^{2 +} (a q) + 2 C l^{-} \to C u C l (l)

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C u (s) + C u^{+} (a q) + C l^{-} \to C u C l (s)

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None of these

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Solution

The correct option is A $C u (s) + C u^{2 +} (a q) + 2 C l^{-} \to C u C l (s)$
Although $C u^{+}$ disproportionates in aqueous solution as $2 C u^{+} (a q) \to C u (s) + C u^{2 +} (a q)$ .
The oxidation state of copper changes from +1 to 0 and +2.
The reaction in which disproportionation is reversed is $C u (s) + C u^{2 +} (a q) + 2 C l^{-} \to C u C l (s)$ . The oxidation state of copper changes from +2 and 0 to +1.

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Similar questions

Q. Consider the following half cells

C u_{(s)} \to C u_{(a q)}^{2 +} + 2 e^{-}; E^{o} = - 0.325 V

C u_{(a q)}^{+} + e^{-} \to C u_{(s)}; E^{o} = 0.50 V

The

E^{o}

for the reaction

2 C u_{(a q)}^{+} \to C u_{(a q)}^{2 +} + C u_{(s)}

Given the half cell reactions:
$C u^{+} (a q) + e^{-} \to C u (s); E^{0} = + 0.52 V C u^{2 +} (a q) + e^{-} \to C u^{+} (a q); E^{0} = + 0.165 V$
The equilibrium constant for the disproportionation reaction at 298 K is:
$2 C u^{+} (a q) \to C u (s) + C u^{2 +} (a q)$