Electrolysis in 3D

Pick an electrolyte and switch on the current: cations move to the cathode and anions to the anode, where products form.

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Questions students ask

What is formed at the cathode in electrolysis of brine?

Hydrogen gas: sodium is too reactive to be discharged, so hydrogen ions are discharged instead.

Why must an ionic compound be molten or dissolved?

So the ions are free to move to the electrodes.

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