How many grams of zinc will react with sulfuric acid to produce 4.5 liters of hydrogen?

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 synthesized amount of hydrogen. To do this, we divide the volume of the obtained gas by the volume of 1 mole of gas (22.4 liters).

M H2 = 2 grams / mol; N H2 = 4.5 / 22.4 = 0.2 mol;

The same amount of zinc will react.

Let’s calculate the weight of zinc.

M Zn = 65 grams / mol; m Zn = 0.2 x 65 = 13 grams;