Calculate what mass of salt is obtained by reacting 1 kg of limestone containing 10% impurities

Calculate what mass of salt is obtained by reacting 1 kg of limestone containing 10% impurities with an excess of hydrochloric acid.

The reaction of calcium carbonate with hydrochloric acid is described by the following chemical reaction equation:

CaCO3 + 2HCl = CaCl2 + CO2 + H2O;

One mole of limestone forms one mole of calcium chloride.

Let’s find the amount of limestone substance.

The mass of pure limestone will be:

m CaCO3 = 1,000 x 0.9 = 900 grams;

Its molar mass is:

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

The amount of the substance will be:

N CaCO3 = 900/100 = 9 mol;

Let’s calculate the mass of 9 mol of calcium chloride.

Its molar mass is:

M CaCl2 = 40 + 35.5 x 2 = 111 grams / mol;

Its mass will be:

m CaCl2 = 9 x 111 = 999 grams;