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ELECTROLYSIS OF WATER: HOFFMAN APPARATUS
Demonstrated With Balloons
Electricity is passed through a weak electrolyte solution of H2SO4(aq). H+ ions are attracted to the Cathode (red wire) where they gain electrons to form H2(g). At the Anode (blue wire) H2O molecules decompose to replace lost H+ ions releasing O2(g).
Copyright:© 1987 Ken Kay - Fundamental Photographs
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