How many liters of hydrogen will be released when 240 g of calcium reacts with hydrochloric acid?

To solve the problem, let’s write down the data:

Ca + 2HCl = CaCl2 + H2 – OBP, hydrogen is evolved;

Calculations by formulas:
M (Ca) = 40 g / mol;

M (H2) = 2 g / mol.

Determine the amount of the original substance, if the mass is known:
Y (Ca) = m / M = 240/40 = 6 mol;

Y (H2) = 6 mol since the amount of these substances is equal to 1 mol.

We find the volume of H2:
V (H2) = 6 * 22.4 = 134.4 L

Answer: Hydrogen produced with a volume of 134.4 liters