Question

How many gram of co2 is required to be passed through a tank of lime water to produce 100gm of caco3

Answer 1

CO2(g) + Ca(OH)2(aq) -----> CaCO3(s) + H2O(l)

The white milky suspension/precipitate is caused by the formation of calcium carbonate and explains the limewater  test for carbon  dioxide.

Bubbling carbon dioxide through the solution for an extended period of time makes the solution become clear and colourless as the carbon dioxide forms acidic carbonic acid when it dissolves in the water, the carbonic acid (H2CO3) reacts further with the calcium carbonate:

CO2 + H2O ------> H2CO3

H2CO3 +CaCO3 --------> Ca(HCO3)2 

Ca(HCO3)2 = calcium hydrogen carbonate which is soluble in water.

This chemistry is important in understanding how hard water is formed and then lime scale is formed in kettles and hot water boilers.

Answer 2

Hi!!

I do not know the universal method but this problem can be solved using the following method which i found myself.

ANSWER IS IN ATTACHMENT!!

I HOPE IT HELPED!!