Question

why limewater turns milky when carbon dioxide gas bubbles through it? ​

Answer 1

Answer:

The reaction between lime water, which is a solution of calcium hydroxide Ca(OH)2 , and carbon dioxide CO2 will result in the formation of an insoluble solid called calcium carbonate CaCO3 . The solution will turn milky due to the fact that calcium carbonate is a white precipitate.

Answer 2

Answer:

Carbon dioxide reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate. Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white.