Question

what is oxidized in the reaction below? h2 + cl2 → 2hcl a. h2 b. cl2 c. hcl d. oxidation does not occur.

Explanation:

Oxidation is the loss of electrons. In the reaction $H_2 + Cl_2
ightarrow 2HCl$, hydrogen in $H_2$ has an oxidation - state of 0 and in $HCl$ it has an oxidation - state of +1. Hydrogen loses electrons and its oxidation state increases. Chlorine in $Cl_2$ has an oxidation - state of 0 and in $HCl$ it has an oxidation - state of - 1, gaining electrons (reduction).

Answer:

A. $H_2$