What mass of calcium carbonate can replace the magnesium carbonate required for reactions

What mass of calcium carbonate can replace the magnesium carbonate required for reactions with a 7.3% hydrochloric acid solution with a volume of 194.2 ml. density-1.03g / ml

The dissolution reaction of limestone in hydrochloric acid is described by the following chemical reaction equation:

CaCO3 + 2HCl = CaCl2 + CO2 + H2O;

When 1 mol of limestone is dissolved in acid, 1 mol of gaseous carbon dioxide is synthesized. This consumes 2 mol of hydrochloric acid.

Let’s calculate the available chemical amount of hydrochloric acid substance.

M HCl = 1 + 35.5 = 36.5 grams / mol;

N HCl = 194.2 x 1.03 x 0.073 / 36.5 = 0.4 mol;

To neutralize such an amount of acid, 0.4 / 2 = 0.2 mol of calcium carbonate will be required.

Let’s calculate its weight.

M CaCO3 = 40 + 12 + 16 x 3 = 100 grams / mol;

m CaCO3 = 100 x 0.2 = 20 grams;