Question

Look at the reaction below.

Which substance is the acid in the reaction?
Mg(s)
H2(g)
MgSO4(aq)
H2SO4(aq)

Answer 1

The acid is H2SO4(an)

Answer 2

Answer: $H_2SO_4$ is a acid.

Explanation: Acid is anything which donates $H^+$ ions and in this reaction $H_2SO_4$ is donating $H^+$ ions, therefore it is considered as an Acid.

This reaction is a type of reaction an acid undergoes that is when an acid reacts with metal it produces metal salt and hydrogen gas

$2HA(aq)+2M(s)\rightarrow 2MA(aq)+H_2(g)$

and the given reaction is

$H_2SO_4(aq)+Mg(s)\rightarrow MgSO_4(aq)+H_2(g)$

where, $H_2SO_4$ = Acid

Mg = metal

$MgSO_4$ = Metal Salt

$H_2$ = Hydrogen gas