How many grams of calcium is there in 250 g of limestone?

The limestone roasting reaction is described by the following equation:

CaCO3 = CaO + CO2 ↑;

When decomposing 1 mol of limestone, 1 mol of calcium oxide and 1 mol of carbon monoxide is obtained.

Let’s determine the chemical amount of calcium carbonate. To do this, divide its weight by its molar mass.

M CaCO3 = 40 + 12 + 16 x 3 = 100 grams / mol; N CaCO3 = 250/100 = 2.5 mol;

Let’s calculate the weight of 2.5 mol of calcium.

For this purpose, we multiply the amount of the substance by its molar weight.

M Ca = 40 grams / mol; m Ca = 2.5 x 40 = 100 grams;