Question

The gas liberated when sodium carbonate reacts with dilute hydrochloric acid
is passed through lime water, a white precipitate is formed. But when the same
gas is passed through lime water in excess, precipitate is not visible. Why?​

Answer 1

the product formed is cahco3 which is colour less.

Explanation:

the gas obtained from the above question is co2 and when co2 is passed in excess the product obtained is cahco3 which is colourless.