Marble is made primarily of calcium carbonate.

Question

When calcium carbonate reacts with hydrogen chloride, it reacts to form calcium chloride, carbon dioxide, and water. If this reaction occurs with 51.6% yield, what mass of carbon dioxide will be collected if 16.93 g of CaCO3 is added to sufficient hydrogen chloride? Please show all your work! 

Answer 1

Fang:

 

Write the balanced equation:

 

CaCO3 + HCl → CaCl2 + H2CO3 → CaCl2 + H2O + CO2  ( carbonic acid forms CO2 and H2O immediately)

 

CaCO3 + HCl → CaCl2 + H2O + CO2

 

Balance:

 

CaCO3 + 2HCl → CaCl2 + H2O + CO2

 

Now you have a balanced equation so that you can find the proper mole ratio.

 

Begin with the given:

 

16.93 g of CaCO3 x 1 mole CaCO3/100.09 g CaCO3 x 1 mole CO2/1 mole CaCO3 x 44.01g CO2/1 mole CO2 = 7.44 g CO2

 

This is the theoretical yield.

 

 Actual Yield = Theoretical yield x % Yield

 

AY = 7.44 g CO2 x .516 = 3.84 g CO2