The electrolysis of copper(ii) sulfate solution using inert electrodes
1 mark · NormalWhich of the following is the correct balanced half-equation for the reaction at the anode during the electrolysis of copper(II) sulfate solution using inert electrodes?
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Correct option: 4OH^-(aq) \rightarrow 2H_2O(l) + O_2(g) + 4e^-
Common mistakes: Choosing copper or hydrogen half-equations
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Marking points
A1 · 1 mark · Selects the correct half-equation for anode (oxygen production)
Worked solution
At the anode, hydroxide ions are oxidised to form water and oxygen gas. The correct equation is: