Question

When zinc reacts with hydrochloric acid, it produces hydrogen gas. As the reaction proceeds, why does the rate of production of hydrogen gas decrease?

The concentration of hydrogen gas decreases.
The concentration of the reactants decreases.
The hydrogen gas formed inhibits the reaction.
The hydrogen gas also reacts with the zinc metal.

Answer 1

a the concentration of hydrogen gas decreases

Step-by-step explanation:

Zn +HCl ---) ZnCl +H evolves