ElectrochemistryHard
Question
Two platinum electrodes were immersed in a solution of CuSO4 and electric current was passed through the solution. After some time, it was found that colour of CuSO4 disappeared with the evolution of gas at the electrode. The colourless solution contains
Options
A.platinum sulphate
B.copper sulphate
C.copper hydroxide
D.sulphuric acid
Solution
At cathode: $Cu^{2 +}(aq) + 2e^{-} \rightarrow Cu(s)$
At anode: $2H_{2}O(l) \rightarrow O_{2}(g) + 4H^{+}(aq) + 4e^{-}$
Hence, solution becomes rich in H2SO4.
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