Electrolysis cells
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Each cell consists of a 75 (l) x 25 (int dia) mm glass cylinder with a 2 hole rubber stopper fitted with 2 carbon electrodes. Electrical contact is made through the crocodile clips and a piece of insulating material between the electrodes prevents short circuiting. The gases evolved are collected in two 57 x 10mm test tubes suspended over the electrodes by a piece of wood and rubber bands. Set of 3.