Balance each redox reaction occurring in basic solution.
NO2−(aq)+Al(s)→NH3(g)+AlO2−(aq)
Al(s)+MnO4−(aq)→MnO2(s)+Al(OH)4−(aq)
Express your answer as a chemical equation. Identify all of the phases in your answer.
Balance each redox reaction ?
2020-07-29 4:52 pm
回答 (1)
2020-07-29 7:56 pm
1.
Oxidation half equation: Al(s) + 4OH⁻(aq) → AlO₂⁻(aq) + 2H₂O(ℓ) + 3e⁻
Reduction half equation: NO₂⁻(aq) + 5H₂O(ℓ) + 6e⁻ → NH₃(g) + 7OH⁻(aq)
(Oxidation half equation)×2 + (Reduction half equation)×1, and cancel 6e⁻, 4H₂O(ℓ) and 7OH⁻(aq) on the both sides. The overall redox equation is:
NO₂⁻(aq) + 2Al(s) + H₂O(ℓ) + OH⁻(aq) → NH₃(g) + 2AlO₂⁻(aq)
====
2.
Oxidation half equation: Al(s) + 4OH⁻(aq) → Al(OH)₄⁻(aq) + 3e⁻
Reduction half equation: MnO₄⁻(aq) + 2H₂O(ℓ) + 3e⁻ → MnO₂(s) + 4OH⁻(aq)
(Oxidation half equation) + (Reduction half equation), and cancel 3e⁻ and 4OH⁻(aq) on the both sides. The overall redox equation is:
Al(s) + MnO₄⁻(aq) + 2H₂O(ℓ) → MnO₂(s) + Al(OH)₄⁻
Oxidation half equation: Al(s) + 4OH⁻(aq) → AlO₂⁻(aq) + 2H₂O(ℓ) + 3e⁻
Reduction half equation: NO₂⁻(aq) + 5H₂O(ℓ) + 6e⁻ → NH₃(g) + 7OH⁻(aq)
(Oxidation half equation)×2 + (Reduction half equation)×1, and cancel 6e⁻, 4H₂O(ℓ) and 7OH⁻(aq) on the both sides. The overall redox equation is:
NO₂⁻(aq) + 2Al(s) + H₂O(ℓ) + OH⁻(aq) → NH₃(g) + 2AlO₂⁻(aq)
====
2.
Oxidation half equation: Al(s) + 4OH⁻(aq) → Al(OH)₄⁻(aq) + 3e⁻
Reduction half equation: MnO₄⁻(aq) + 2H₂O(ℓ) + 3e⁻ → MnO₂(s) + 4OH⁻(aq)
(Oxidation half equation) + (Reduction half equation), and cancel 3e⁻ and 4OH⁻(aq) on the both sides. The overall redox equation is:
Al(s) + MnO₄⁻(aq) + 2H₂O(ℓ) → MnO₂(s) + Al(OH)₄⁻
收錄日期: 2021-04-18 18:35:23
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