Question

If 200 g calcium carbonate is heated, how much g carbon dioxide will be produced

Answer 1

Hi, please consider the answer below;

If 200 g calcium carbonate is heated, the mass of the carbon dioxide produced is calculated as follows;

First consider the equation for the decomposition of calcium carbonate

CaCO3 ------> CaO + CO2

the number of moles of calcium carbonate is 200/100 =2 moles

but the mole ratio is 1:1:1

hence the moles of CO2 is 2.

but molar mass of CO2 is 44

hence the mass of CO2 produced is = moles x fomular mass

Mass of CO2 produced = 2 x 44 = 88g

Answer 2

The equation of the Roasting will be,

CaCO₃ ----- CaO + CO₂

Molar mass of the CaO = 56 g.

Molar mass of the CaCO₃ = 100 g.

Molar mass of the CO₂ = 44 g.

Now,  

100 g of the CaCO₃ produces 44 g of the Carbon dioxide.

∴ 1 g of the CaCO₃ produces 44/100 g of the Carbon dioxide.

∴ 200 g of the CaCO₃ produces 44/100 × 200 = 88 g of the Carbon dioxide.

Hence, the mass of the Carbon dioxide is 88 g.

Hope it helps.