Question

the student is studying the properties of acetic acid list two physical properties of acetic acid what happen when he adds a pinch Na2HCo3 to this acid

Answer 1

it has a sour taste and pungent smell.
when reacts to sodium bicarbonate it gives sodium acetate and carbonic acid

Answer 2

1) Acetic Acid reacts with sodium Bicarbonate to produce co2

2) When dissolved in water, acetic acid undergoes dissociation to form hydrogen ion.

When we add Na2HCO3 to acetic acid co2 gas is liberated.