Ch3cooh+nahco3 = = = ch3coona+H2O+CO2 (gas)

That is, white vinegar reacts with baking soda in soda water to generate CO2 gas, which is the observed bubbles.

Among them, white vinegar is acidic and soda water is alkaline.

So from another perspective, the so-called purple cabbage water turns red when it meets acid and green when it meets alkali.

It should be noted here that NaHCO3 is also sodium bicarbonate, commonly known as baking soda However, its aqueous solution with a certain concentration is called soda water. (Not baking soda water. . . )

Soda is Na2CO2 now, but the solution of Na2CO3 is not called soda water.

Please accept the satisfactory answer! ~