Electrolysis of a potssium iodide solution between inert electrodes
See the device! The two electrodes are graphite electrodes. The generator supplies continuous current.
A potassium iodide solution is introduced into the electrolysis vessel.
Phenolphtalein is added.
Electrolysis begins.
At the cathode an excess of hydoxide ion colorates the phenolphtalein. A colourless gas is produced.
At the anode elementary iodine appears.
See the result !
Voici le dispositif. Les électrodes sont toutes les deux en graphite. Le carbone graphite est assez inerte dans les phénomènes d'électrolyse.
