Zinc weighing 13 grams was dissolved in hydrochloric acid, the volume of the evolved gas is 4 liters.

Zinc weighing 13 grams was dissolved in hydrochloric acid, the volume of the evolved gas is 4 liters. will determine the mass fraction of the gas yield from the theoretically possible.

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 13 grams of zinc.

M Zn = 65 grams / mol;

N Zn = 13/65 = 0.2 mol;

The same chemical amount of hydrogen will be synthesized.

Let’s calculate its theoretical volume.

Under normal conditions, one liter of ideal gas assumes a volume of 22.4 liters.

V H2 = 0.2 x 22.4 = 4.48 liters;

The reaction yield is:

K = 4 / 4.48 = 0.893 = 89.3%;