Electrolysis of water. An apparatus to demonstrate electrolysis of water. Two electrodes are immersed in a cylinder containing water and a very dilute
Electrolysis of water. An apparatus to demonstrate electrolysis of water. Two electrodes are immersed in a cylinder containing water and a very dilute electrolyte ( sulphuric acid). A filled test tube is placed inverted in the water directly above each electrode. When a current is applied to the electrodes, hydrogen is liberated at the cathode (left) and oxygen at the anode in the volume ratio of 2:1. Here the activity at the cathode is clearly the more vigorous. If both gases are diatomic (which they are), this shows that water contains twice as many hydrogen atoms as oxygen - H2O.
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Keywords: analysis, apparatus, cell, demonstration, education, electricity, electrochemical, electrochemistry, electrode, electrodes, electrolysis, electrolyte, electrolytic, experiment, experimental, glass, glassware, h2, h2o, hydrogen, laboratory, liberated, liberation, o2, oxygen, pair, platinum, school, science, volumetric, water
