Electrolysis

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Electrolysis
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Water Molecules
Zumdahl, Zumdahl, DeCoste, World of Chemistry
2002, page 8
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The decomposition of two water molecules.
Water molecules
Electric current
2 H2O ? O2 2 H2
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Electrolysis
electro electricity lysis to split
H1
H2O(l) O2 (g) 2 H2 (g)
water oxygen hydrogen
Must add acid catalyst to conduct electricity
Zumdahl, Zumdahl, DeCoste, World of Chemistry
2002, page 32
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Electrolysis of Water
Half reaction at the cathode (reduction) 4
H2O 4 e - ? 2 H2 4 OH 1- Half
reaction at the anode (oxidation) 2 H2O ?
O2 4 H 1 4 e -