Carbonic acid: Carbonic acid is a chemical compound with the formula H2CO3. It is a weak acid whose conjugate bases are the anions HCO3- (bicarbonate) and CO32- (carbonate). It is formed in particular in water by solvation of carbon dioxide:
CO2(aq) + H2O(l) {\displaystyle \rightleftharpoons } \rightleftharpoons H2CO3(aq),
with a hydration equilibrium constant of Kh = [H2CO3] / [CO2] ≈ 1,70×10-3 at 25°C, which means that carbonic acid is a mo...
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