Balancing the pH in the gastric

Glands in the gastric produce about two to three liters of acidic gastric fluidevery day . The gastric juices containing hydrolic acid ( HCI ) with a concentration of about ) 0,03 M. Hydrochloric acid is causing the gastric is acidic with a PH around 1,5. Excessive production of gastric acid will cause an ulcer or ulcer pain, with symptoms of nausea, pains, and bloating. To lower the acidity level ( levels of stomach acid) is used heartburn drugs known as antacids.

Antacids are generally a compound that is alkaline, so as to neutralize the excessive acid present in the gastric fluid. Some of the compounds used by antacids for example, calcium carbonate (CaCO₃), socium bicarbonate (NaHCO₃), magnesium carbonate (Mg(OH)₂, aluminum hydroxide ( Al(OH)₃) or combinations there of.

The reaction is:
  NaCl (aq) + H2O (l) + CO2 (g) -> NaHCO3 (aq) + HCl (aq)
  CaCl2 (aq) + H2O (l) + CO2 (g) -> CaCO3 (s) + 2HCl (aq)
  MgCl2 (aq) + H2O (l) + CO2 (g) -> MgCO3 (s) + 2HCl (aq)
  MgCl2 (aq) + 2H2O (l) -> Mg (OH) 2 +2 HCl (aq)
  AlCl3 (aq) + 3H2O -> Al (OH) 3 (s) + 3HCl (aq)

CO2 gas produced in the reaction can increase the gas pressure in the gastric, so it issued a burp. Generally, antacid drug that has been chosen is the kind of poorly soluble, so the reaction is slow and can last a long time, such as aluminum hydroxide and magnesium hydroxide.Some ulcer medications such as Mylanta, alumy, Promag, andthe like containing the main compound of magnesium hydroxide and aluminumhydroxide.