Base your answers to questions 81 and 82 on the information below and on
your knowledge of chemistry.
The gastric juice of the human stomach has a pH value
of approximately 1.5. Hydrochloric acid in the gastric juice is
necessary for the digestion process. However, excess hydrochloric acid
may harm the stomach lining. One type of antacid uses Mg(OH)2(s) to
neutralize excess hydrochloric acid in the stomach. This neutralization
is represented by the incomplete equation below.
Mg(OH)2(s) + 2HCl(aq) → _____ (aq) + 2H2O(ℓ)
81 Complete the equation in your answer booklet by
writing the formula of the missing product. 
82 Describe the changes in both the hydrogen ion concentration and the
pH of the gastric juice of a human after ingesting this type of antacid.
|Answer--> Hydrogen ion concentration: