Question

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Predict the products of electrolysis of a solution of copper(ii) sulfate if carbon electrodes are used instead of those made from copper as referred to in the purification of copper section.​

Answer 1

Answer:

The products of electrolysing copper sulfate solution with inert electrodes (carbon/graphite or platinum) are copper metal and oxygen gas.

Using the simple apparatus (above left diagram) and inert carbon (graphite) electrodes, you can observe the products of the electrolysis of copper sulfate solution are (i) a copper deposit on the negative cathode electrode and (ii) oxygen gas at the positive anode electrode. This anode reaction differs from when you use copper electrodes (see section (b) below). You have to fill the little test tubes with the electrolyte (dil. copper sulfate solution), hold the liquid in with your finger and carefully invert them over the nearly full electrolysis cell. The very simple apparatus (above right) can be used with two inert wire electrodes

Explanation:

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