Identify the oxidized and reduced substances in the following reactions.
H₂(g) + Cl₂(g) $\to$ 2HCl(g)

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Solution

The substance that loses electrons is being oxidized.
The substance that gains electrons is being reduced.
In the given reaction, hydrogen loses an electron and that electron is gained by chlorine.
Therefore, the substance oxidized is hydrogen(H₂) and the reduced one is chlorine(Cl).

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