Question

Well, we might as well try a similar question. Magnesium metal reacts with hydrochloric acid to produce hydrogen gas and an aqueous solution of magnesium (II) chloride. What substance is being oxidized. A)H2(g) B)MgCl2(aq) C)HCl(aq) D)Mg(s)

Answer 1

Answer: $Mg$ is being oxidized.

Explanation:

The chemical equation for magnesium metal reacts with hydrochloric acid to produce hydrogen gas and an aqueous solution of magnesium (II) chloride.

$Mg(s)+2HCl\rightarrow MgCl_2(aq)+H_2(g)$

Oxidation reaction : When there is a loss of electrons and an increase in oxidation state number.

$Mg\rightarrow Mg^{2+}+2e^-$

Reduction reaction : when there is gain of electrons and a decrease in oxidation state number.

$2H^{+}+2e^-\rightarrow H_2$

Thus $Mg$ is being oxidized.