Question

What would be the advantages of using Al(OH)3 as an antacid rather than NaHCO3, which undergoes the following reaction with stomach acid?

NaHCO3(aq) + HCl(aq) →→→→ NaCl(aq) +
H₂O(l) + CO₂(g)

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Answer 1

Aluminum hydroxide (Al(OH)3) has several advantages over sodium bicarbonate (NaHCO3) as an antacid. One advantage is that Al(OH)3 does not neutralize stomach acid as quickly as NaHCO3 does, so it can provide longer-lasting relief for symptoms of heartburn and indigestion. Additionally, Al(OH)3 is less likely to cause side effects such as diarrhea, which can be a common problem with overuse of NaHCO3. Furthermore, Al(OH)3 can also adsorb excess stomach acid and form a physical barrier that helps to protect the stomach lining.