Foundation
Chemistry Foundation
Mole Concept and Calculation
Question
What are the products of electrolysis of one mole of pure distilled water?
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Solution
Electrolysis of water decomposes it into hydrogen and oxygen gases. The balanced chemical equation is:
This shows 2 moles of water (36 g) produce 2 moles of H₂ (4 g) and 1 mole of O₂ (32 g). Therefore, 1 mole of water (18 g) would produce half these amounts: 2 g of H₂ and 16 g of O₂.
Final Answer: 2 g of H2 gas and 16 g of O2 gas are produced.