Calculate the volume of hydrogen that can be obtained by dissolving 19.5 g of zinc in sulfuric acid.

Zinc metal reacts with sulfuric acid to release hydrogen gas and form zinc sulfate (zinc sulfate). The reaction is described by the following equation:

Zn + H2SO4 = ZnSO4 + H2;

The metal reacts with acid in equal molar amounts. During the reaction, the same amounts of salt and hydrogen are synthesized.

Let’s calculate the available chemical amount of zinc. To do this, divide the weight of pure metal by the weight of 1 mole of metallic zinc.

M Zn = 65 grams / mol; N Zn = 19.5 / 65 = 0.3 mol;

The same amount of hydrogen and zinc sulfate will be synthesized.

Let’s calculate the volume of this amount of hydrogen. To do this, multiply its amount by the volume of 1 mole of gas (22.4 liters).

N H2 = 0.3 mol; V H2 = 0.3 x 22.4 = 6.72 liters;