± Electrolysis and Current?
2016-05-06 4:10 am
Calculate the magnitude of the current in amperes if the number of moles of hydrogen gas produced is 4.39×10−4 mol.
回答 (1)
2016-05-06 4:21 am
2H⁺(aq) + 2e⁻ → H₂(g)
OR: 2H₃O⁺(aq) + 2e⁻ → 2H₂O(l) + H₂(g)
Number of moles of H₂ produced = 4.39 × 10⁻⁴ mol
According to the equation above, the production of 1 mole of H₂ needs 2 moles of e⁻.
Number of moles of e⁻ = (4.39 × 10⁻⁴) × 2 = 8.78 × 10⁻⁴ mol
Each molecules of e⁻ carries 96500 C of electricity.
Amount of electricity, Q = 96500 × (8.78 × 10⁻⁴) = 84.7 C
Q = It
Current, I = Q/t = 84.7 / (3 × 60) = 0.471 A
OR: 2H₃O⁺(aq) + 2e⁻ → 2H₂O(l) + H₂(g)
Number of moles of H₂ produced = 4.39 × 10⁻⁴ mol
According to the equation above, the production of 1 mole of H₂ needs 2 moles of e⁻.
Number of moles of e⁻ = (4.39 × 10⁻⁴) × 2 = 8.78 × 10⁻⁴ mol
Each molecules of e⁻ carries 96500 C of electricity.
Amount of electricity, Q = 96500 × (8.78 × 10⁻⁴) = 84.7 C
Q = It
Current, I = Q/t = 84.7 / (3 × 60) = 0.471 A
收錄日期: 2021-04-18 14:47:49
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https://hk.answers.yahoo.com/question/index?qid=20160505201054AAPSwyW