Respuesta :

The oxidation state of hydrogen gas is 0 and oxidation state of hydrogen cation is +1.
There’s an increase in oxidation number therefore it’s an oxidation reaction.
Oxidation reactions give out electrons. The masses and charges on both sides should be balanced
Half reaction is
H2 —> 2H+ +2e

Answer: [tex]H_2(g\rightarrow 2H^+(aq)+2e^-[/tex]

Explanation:

Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously.

Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.

Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.

[tex]H_2(g)\rightarrow 2H^+(aq)+2e^-[/tex]

On reactant side:

Oxidation state of hydrogen = 0

On product side:

Oxidation state of [tex]H^+[/tex] = +1

The oxidation state of hydrogen increases from 0 to +1. Thus, it is getting oxidized and it undergoes oxidation reaction.