10. Antacids are bases used to neutralize the acid that often causes stomach pai

Question

10. Antacids are bases used to neutralize the acid that often causes stomach pain and heartburn. Despite the many commercial brands of antacids, almost all include weak bases that act to neutralize excess stomach acid. The most common of these bases are hydroxides, carbonates, icarbonates. Milk of Magnesia is a white suspension containing water-insoluble magnesium hydroxide. When an appropriate amount of aqueous hydrochloric acid is added to the suspension, a color change is noted indicating that a chemical reaction has occurred. This reaction resulted in the formation of water-soluble magnesium chloride and water, and now appeared to be colorless. Complete and balance the chemical equation (with physical states). a. b. Classify the reaction (based on the six types in the introduction):

Explanation / Answer

a) The complete and balanced chemical reaction of milk of magnesia and hydrochloric acid is given below:

2HCl (aq) + Mg(OH) (s) MgCl (aq) + 2HO (l)

b) It is kind of acid-base neutralization reaction. Because here, hydrochloric acid reacts with milk of magnesia (base) and results a salt and water as product.

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