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Oxides of Sulphur

Which substan...

Question

Which substance/ion is oxidised and which substance/ion is reduced in the following reaction?
$S n C l_{2} + 2 F e C l_{3} \to S n C l_{4} + 2 F e C l_{2}$ .

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Solution

$S n C l_{2} + 2 F e C l_{3} \to S n C l_{4} + 2 F e C l_{2}$ .
Oxidised- $S n C l_{2}$ The oxidation number of Sn increases from +2 to +4. Thus, Sn itself is oxidised and acts as reducing agent.
Reduced- $F e C l_{3}$ . The oxidation number of Fe decreases from +3 to +2. Thus, Fe itself is reduced and acts as oxidising agent.

Note:
Any species that is oxidised acts as reducing agent.
Any species that is reduced acts as oxidising agent.

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Q. Indicate which of the substance/ ion in the following reaction is an oxidising agent and which is a reducing agent?

2 F e C l_{3} + S n C l_{2} \to 2 F e C l_{2} + S n C l_{4}

Q. Which substance/ion is oxidised and which substance/ion is reduced in the following reaction?

H_{2} S + 2 F e C l_{3} \to 2 F e C l_{2} + 2 H C l + S

Q. In following reaction which acts as reducing agent-

2 F e C l_{3} + S n C l_{2} \to 2 F e C l_{2} + S n C l_{4}

Q. In the following reactions, identify the species oxidised, the species reduced, the oxidising agent and the reducing agent.

S n C l_{2} + 2 F e C l_{3} \to S n C l_{4} + 2 F e C l_{2}

Q. Which substance/ion is oxidised and which substance/ion is reduced in the following reaction?

M n O_{2} + 4 H C l \to M n C l_{2} + 2 H_{2} O + C l_{2}

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