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Properties of Water

Indicate whic...

Question

Indicate which of the substance/ion in the following reaction is an oxidising agent and which is a reducing agent?
$C a + C l_{2} \to C a C l_{2}$ .

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Solution

$C a + C l_{2} \to C a C l_{2}$ .
Oxidising agent- $C l_{2}$ The oxidation number of Cl decreases from 0 to -1. Thus, Cl itself is reduced.
Reducing agent- Ca. The oxidation number of Ca increases from 0 to +2. Thus, Ca itself is oxidised.

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

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