Q.
100g of CaCO3 is treated with 1 litre of 1NHCl. What would be the weight of CO2 liberated after the completion of the reaction ?
3971
212
Some Basic Concepts of Chemistry
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Solution:
1Lof 1NHCl=1L of 1MHCl=1molofHC1
Amount of CaCO3=100g=1mol 1molCaCO3+2mol2HCl→CaCl2+44g(1mol)CO2+H2O
Thus HCl is the limiting reactant. 2 mol of HCl after reaction with CaCO3 give CO2=1mol 1mol of HCl after reaction with CaCO3 give CO2= mol. ∴ Mass of CO2 obtained =1/2×44=22g