Question

In an experiment to study the properties of acetic acid a student adds sodium hydrogen carbonate to the said acid. What he will observe give relevant equation

Answer 1

$\bold{Experiment}$

▶Take a clean and dry test tube.

▶Take acetic acid or ethanoic acid to the test tube.

▶Now ,add sodium bi carbonate or sodium hydrogen carbonate to it.

$\bold{OBSERVATION}$

▶A colourless odurless gas evolves with effervescence .

▶Droplet of water is seen at the junction of test tube.

$\bold{INFERENCE}$

▶On bringing a moist blue litmus paper , it turns faint red.

Gas is weak acidic.

▶When the colourless odurless gas is passed over lime water , lime water s milky .On passing excess milkyness disappears.

The gas may be sulphur dioxide or carbondioxide.

▶Gas has no effect on pottasium permanganate and pottasium dichromate paper.

Carbondioxide is confirmed.

So, the gas evolved is carbondioxide.

$\bold{EQUATION}$

$CH_3COOH + NaHCO_3 \longrightarrow CH_3COONa + H_2O + CO_2$