Question

Soda water contains _____

Answer 1

Carbonic acid:

1. Soda water is basically a carbonated water which holds water and into this Carbon dioxide gas has been dissolved under the pressure.
2. Basically Carbon dioxide and the water just reacts chemically to yield the Carbonic acid which is actually a weak acid.
3. Generally, the pH of the Carbonated water is 3-4 which is actually slightly acidic in nature.
4. Reaction for the formation of Carbonic acid: $\underset{\mathrm{Water}}{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}+\underset{\mathrm{Carbon}\mathrm{dioxide}}{{\mathrm{CO}}_2\left(\mathrm{g}\right)}\rightleftarrows \underset{\mathrm{Carbonic}\mathrm{acid}}{{\mathrm{H}}_2{\mathrm{CO}}_3\left(\mathrm{aq}\right)}$

Therefore, Soda water contains carbonic acid.