Apparatus: Big test tube, small test tube, bent gas delivery tube, rubber cork, thistle funnel, stand, etc.
Chemical : Acetic acid, sodium carbonate power, freshly prepared lime water.
Procedure : Arrange the apparatus as shown in figure. Plance sodium carbonate powder in the big test tube. Pour 10 ml acetic acid through the thistle funnel. Observe the changes taking place in the two test tubes.

What is the colour change in the lime water? Write the related equation.

Explanation

The lime water turns milky.
Reaction :
`underset("Lime water")(Ca(OH)_(2)) +CO_(2g) to underset(("milky")) underset("Calcium carbonate")(CaCO_(3)darr+H_(2)O)`