People take antacids, such as milk of magnesia, to reduce the discomfort of acid stomach or heartburn. The recommended dose of milk of magnesia is 1 teaspoon, which contains 400 mg of Mg(OH)2. What volume of HCl solution with a pH of 1.1 can be neutralized by 1 dose of milk of magnesia? (Assume two significant figures in your calculations.)
Here, we are going to calculate the volume HCl required to neutralize 1 dose of milk of magnesia.
pH = -log [H+]
= 10-pH = 10-1.1
= 0.0794 M = 0.0794 mol/L