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Explain why cu^(+) ion is not stable in ...

Explain why `cu^(+)` ion is not stable in aqueous solutions?

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`Cu^(+)` in aqueous solution underoes disproportionation, i.e.,
`2Cu^(+)(q)rarrCu^(2+)(aq)+Cu(s)`
The `E^(0)` value for this is favourable.
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