Calculate the mass of zinc that you need to dissolve in hydrochloric acid to get 112 liters of hydrogen.

The reaction of zinc with hydrochloric acid is described by the following chemical equation:

Zn + 2HCl = ZnCl2 + H2;

To obtain 1 mole of hydrogen, you need to take 1 mole of zinc.

Let’s determine the amount of substance in 112 liters of hydrogen.

Under normal conditions, one mole of ideal gas takes up a volume of 22.4 liters.

n = 112 / 22.4 = 5 mol;

The molar mass of zinc is 65 grams / mol.

The mass of 5 mol of zinc will be:

m Zn = 65 x 5 = 325 grams;