Balance the following oxidation-reduction reactions using the half-reaction method. a) S2-(aq) + NO3-(aq) ---> S8(s) +...

Balance the following oxidation-reduction reactions using the half-reaction method.

a) S^2-(aq) + NO₃^-(aq) ---> S₈(s) + NO₂(g) acidic solution

b) MnO₄^-(aq) + I^-(aq) ---> MnO₂(s) + IO₃^-(aq) basic solution

c) Sb(s) + H₂SO₄(aq) ---> Sb₂(SO₄)₃(s) + SO₂(g) acidic solution

Solutions

Expert Solution

(a). 8S^2- (aq) S₈ (s) + 16e^-

16NO₃^-(aq) + 32H⁺ + 16 e^- 16NO₂ (g) + 16H₂O

8S^2-(aq) + 16NO₃^-(aq) + 32H⁺ S₈(s) + 16NO₂(g) + 16H₂O

(b). 2MnO₄^- (aq) + 4H₂O + 6e^- 2MnO₂ (s) + 8OH^-

I^- (aq) + 6OH^- IO₃^-(aq) + 3H₂O + 6e^-

2MnO₄^-(aq) + I^-(aq) + H₂O 2MnO₂ (s) + IO₃^- (aq) + 2OH^-

(c). Sb (s) + 3H₂SO₄ (aq) Sb(SO₄)₃(s) + 6H⁺ + 6e^-

3H₂SO₄(aq) + 6H⁺ + 6e^- 3SO₂ (g) + 6H₂O

Sb(s) + 6H₂SO₄(aq) Sb(SO₄)₃(s) + 3SO₂ (g) + 6H₂O

queen_honey_blossom answered 1 year ago

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