Lessons

Eamcet Chemistry
1st Year : Unit 1.4 (Basics & Concepts) - Stoichiometric Calculations

24 / 30

Q.

What is the weight of calcium carbonate required for the production of 1 L of carbon dioxide at 27oC and 750mm, by the action of dilute hydrochloric acid?

View Answer

Correct choice: B

Explanation:

Given conditions       STP conditions
P1 = 750 mm      P2 = 760 mm
T1 = 300K        T2 = 273K
V1 = 1 Lit         V2 = ?
From the equation of state, the unknown volume is obtained
V2 = = 0.898 L
Calcium carbonate on reaction with hydrochloric acid gives carbondioxide.
CaCO3 + 2HCl → CaCl2 + H2O + CO2
1 mole of CO2 given by 1 mole of CaCO3
22.4 L of CO2 at STP = 100 grams of CaCO3
0.898 L of CO2 at STP = ?
The weight of calcium carbonate required = = 4.009 grams
24 / 30