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Reactivity of Lanthanides

Why is Cu+ ...

Question

Why is $C u^{+}$ ion is not stable in aqueous solution ?

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Solution

Solution:-
In an aqueous medium, energy is required to remove one electron from ${C u}^{+}$ to ${C u}^{2 +}$ but high hydration energy of ${C u}^{2 +}$ compensates for it and thus ${C u}^{+}$ ion in an aqueous solution is unstable. ${C u}^{+}$ ion disproportionates to give ${C u}^{2 +}$ and $C u$ in aqeous solution.

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C u^{+}

ion is not stable in aqueous solution because:

C u^{+}

ion is unstable in aqueous solution, whereas

F e^{2 +}

ion is stable. Reason:

C u^{+}

disproportionate in aqueous solution.

C u^{+}

ion is not stable in aqueous solution because of disproportionation reaction whose

E^{o}

E_{C u^{2 +} / C u^{+}}^{o} = 0.15, E_{C u^{2 +} / C u_{s}}^{o} = 0.34 V

C u^{+}

ion is unstable in aqueous solution, whereas

F e^{2 +}

ion is stable. Reason:

C u^{+}

disproportionate in aqueous solution.

Read the above assertion and reason and choose the correct option regarding it.

C u^{+}

ion is not stable in aqueous solution because of disproportionation reaction.

E^{\circ}

value for disproportionation of

C u^{+}

E^{\circ} C u^{2} / C u = 0.34 V)

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Reactivity of Lanthanides

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