Magnesium weighing 1.2 g, interacting with hydrochloric acid forms hydrogen in volume.

Metallic magnesium dissolves in hydrochloric acid solution. The chemical reaction proceeds according to the following equation:

Mg + 2HCl = MgCl2 + H2 ↑;

Let us determine the molar amount of a substance of metallic magnesium.

For this purpose, we divide its mass by the weight of 1 mole of metallic magnesium.

M Mg = 24 grams / mol;

N Mg = 1.2 / 24 = 0.05 mol;

An equivalent amount of hydrogen gas will be synthesized.

Let’s calculate the volume of hydrogen.

To do this, multiply the amount of substance by the volume of 1 mole of gas (which is 22.4 liters).

V H2 = 0.05 x 22.4 = 1.12 liters;