In: Chemistry
The chemical reactions that happens in the medium are the following:
- First hydrochloric acid (HCl) reacts sodium bicarbonate (NaHCO3) to for carbonic acid (H2CO3) and sodium chloride (NaCl) as shown below:
- Carbonic acid is decomposed into carbon dioxide (CO2) and water (H2O) by heating. CO2(aq) escapes from solution in the form gaz CO2(g) by heating.
- The excess of HCl remained in the solution after reaction with bicarbonate and heating is titrated by NaOH (back titration) as shown by the equation:
Based on the stoichiometry of the reactions given:
1 tablet can neutralize mol of stomach acid.