A student adds a spoon full of powdered sodium hydrogen carbonate to a flask containing ethanoic acid. List two main observations he must note in his note book, about the reaction that takes place. Also write chemical equaiton for the reaction.

Explanation

The two main observations are :
(a) Brisk effervescence of a gas that turns lime water milky. The gas released is `CO_(2)`.
(b) it is a neutralisation reaction releasing salt, water, `CO_(2)` and heat.
`CH_(3)COOH(aq) + NaHCO_(3)(s) rarr CH_(3)COONa(aq) + CO_(2)(g) + H_(2)O(l)`