Why does Cu (I) Sulphate not exist in a solution?

Cu(+2) + e- Cu(+1)E=0.15V Cu(+1) + e- Cu E=0.52V Cu(+2) + 2e- CuE=0.34V It is seen that any oxidant strong enough to convert Cu(+1) to Cu(+2) is more than strong enough to convert Cu(+1) to Cu(+2) (0.52 cf. 0.15V). (1) It is not expected therefore that any stable Cu salts will exist in aqueous solution.

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