Question

calcium carbonate is heated then calcium oxide and carbon dioxide produce from the aboue equation calculate the amount of carbon dioxide in grams librated by heating 25 gram of calcium carbonate

Answer 1

CaCO_​3 (s) ----> CaO (s) + CO₂ (g)

from the above equation :
calculated the amount of CO₂ = 44 gms
as CO₂ = (1 x 12) + (2 x 16)
= 12 + 36
= 44 gms.

Gram molecular mass of CaCO₃ = 40 + 12 + 48

= 100 gms.

hence 25 gm of CaCO₃ gives = 44 x 25/100
= 11gms of CO₂ liberated.