Na2CO3 + 2 HCl --> 2 NaCl + H2O + CO2
H2O + CO2 starts out as carbonic acid- H2CO3 - (carbonation) and decomposes to water and carbon dioxide which is what makes the bubbles in soda.
H2O + CO2 starts out as carbonic acid- H2CO3 - (carbonation) and decomposes to water and carbon dioxide which is what makes the bubbles in soda.