In the reactionHAsO 2- Sn 2- As - Sn 4- H 2 O- oxidising agent isA- Sn 2-B- As C- S n4-D- HAsO 2

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Oxidants and Reductants

In the reacti...

Question

In the reaction
$H A s O_{2} + S n^{2 +} \to A s + S n^{4} + H_{2} O$ , oxidising agent is

S n^{2 +}

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S n^{4 +}

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A s

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H A s O_{2}

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Solution

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H A s O_{2} + S n^{2 +} \to A s + S n^{4} + H_{2} O

[1] P b^{2 +} > P b^{4}, S n^{2 +} > S n^{4 +}

[2] P b^{2 +} < P b^{4}, S n^{2 +} < S n^{4 +}

[3] P b^{2 +} > P b^{4}, S n^{2 +} < S n^{4 +}

[4] P b^{2 +} < P b^{4}, S n^{2 +} > S n^{4 +}

[5] S n^{2 +} < P b^{2 +}, S n^{4 +} > P b^{4 +}

[6] S n^{2 +} < P b^{2 +}, S n^{4 +} < P b^{4 +}

Stability of ions of $G e, S n, a n d P b$ will be in the order:

P b^{4 +} + S n^{2 +} \to S n^{4 +} + P b^{2 +}

S n^{4 +} + P b^{2 +} \to P b^{4 +} + S n^{2 +}

E_{P b^{4 +} / P b^{2 +}}^{o} = 1.69 V, E_{S n^{4 +} / S n^{2 +}}^{o} = 0.15 V

S n^{2 +} + 2 H g^{2 +} \to H g_{2}^{2 +} + S n^{4 +}

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