electric is passed through dilute solution of copper sulphate through carbon rod... a, which colour is formed... b, what is the equation
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The half-equations for the electrolysis of copper(II) sulfate solution
The negative cathode reaction with graphite electrodes
The negative cathode electrode attracts Cu
2+
ions (from copper sulfate) and H
+
ions (from water). Only the copper ion is discharged, being reduced to copper metal. The less reactive a metal, the more readily its ion is reduced on the electrode surface.
A copper deposit forms as the positive copper ions are attracted to the negative electrode (cathode)
Cu
2+
(aq)+2e
→
Cu(s)
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