chemistry redox reaction help?

👨🏻‍🏫 學術台化學

[匿名]

2017-11-29 3:38 pm

Write balanced half-reactions for the following redox reaction:
H3AsO4(aq)+4H2O(l)+4Zn(s)→ AsH3(g)+8OH−(aq)+4Zn+2(aq)

回答 (3)

戇戇居士

2017-11-29 5:18 pm

✔ 最佳答案

Oxidation half-equation: Zn(s) → Zn²⁺(aq) + 2e⁻

Reduction half-equation: H₃AsO₄(aq) + 4H₂O(l) + 8e⁻ → AsH₃(g) + 8OH⁻(aq)

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Roger the Mole

2017-11-29 3:55 pm

As{5+} + 8 e{-} → As{3-}

Zn{0} → Zn{2+} + 2 e{-}

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[匿名]

2017-11-29 3:38 pm

Nope.

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