2HCl + CaCO3 ---> CaCl2 + CO2 + H2O
In the above reaction CO₂ and H₂O are formed along with calcium chloride.
Now my question is why CO₂ and H₂O dont react to form H₂CO₃ ??
Please explain in detail....!!

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Solution

The complete reaction is like this

Stage I CaCO3+ 2 HCl = CaCl2 +H2CO3

Stage II H2CO3 = H2O + CO2

Calcium Carbonate reacts wit Hydrochloric acid to form Calcium Chloride and Carbonic Acid.

Carbonic Acid is unstable and it breaks down to Water and carbon Dioxide gas which escapes in the atmosphere.

So H2O and CO2 don’t make H2CO3 again because it is less stable

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