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Why is a different product formed at the anode when copper sulfate is electrolysed using graphite electrodes rather than copper electrodes?

User Skotch
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Because both S0₄⁻ and OH⁻ ions are attracted to the anode, however OH⁻ ions are more reactive (readily discharged) which means oxygen is produced as there is no copper atoms in the graphite electrode to form ions.
User Akarve
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