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 will turn milky.
(b) `CH_(3)COOH+NaHCO_(3) to CH_(3)COONa+H_(2)O+CO_(2)` (in A)
`Ca(OH)_(2)+CO_(2) to CaCO_(3)+H_(2)O` (in B)
With excess `CO_(2)`, milkiness disappears.
(c ) As `C_(2)H_(5)OH and NaHCO_(3)` do not react, a similar change is not expected
`C_(2)H_(5)OH+NaHCO_(3) to` No change
(d) The lime water is prepared by dissolving calcium oxide in water and decanting the supernatant liquid.