Look at the figure and answer the following questions.

(a) What change would you observe in the calcium hydroxide solution taken in tube B ?
(b) Write the reaction involved in test tubes A and B respectively.
(c ) If ethanol is given instead of ethanoic acid, would you expect same change ?
(d) How can a solution of lime water be prepared in the laboratory ?

Explanation

(a) It would become milky.
(b) In test tube A, ethanoic acid reacts with sodium carbonate to form sodium ethanoate along with carbon dioxide. The gas is evolved accompanied by brisk effervescence.
`underset((A))(CH_(3)COOH)+Na_(2)CO_(3)toCH_(3)COONa+CO_(2)+H_(2)O`
In test tube B, calcium hydroxide reacts with carbon dioxide to form calcium carbonate which is milky in colour.
`Ca(OH)_(2)+CO_(2)tounderset(("milky"))(CaCO_(3))+H_(2)O`
(c) No, it would be different. No chemical reaction is possible between ethanol and sodium carbonate.
(d) Lime water is prepared by keepinig suspension of calcium hydroxide overnight in a beaker. the solution is decanted and is transferred to another beaker. if contains traces of calcium hydroxide and is called lime water.