What mass of hydrogen can be obtained for 12 g of zinc per hydrochloric acid?

The reaction between zinc and hydrogen chloride is described by the following chemical reaction equation.

Zn + 2HCl = ZnCl2 + H2;

1 mole of metal reacts with 2 moles of acid. In this case, 1 mol of salt is synthesized and 1 mol of gaseous hydrogen is released.

Let’s calculate the chemical amount of a substance in 12 grams of zinc.

M Zn = 65 grams / mol;

N Zn = 12/65 = 0.1846 mol;

The same chemical amount of hydrogen will be obtained.

Let’s calculate its mass.

M H2 = 2 grams / mol;

m H2 = 0.1846 x 2 = 0.3692 grams;