Answer to Question #142251 in General Chemistry for Aida

Question

Suppose you are analyzing an antacid that contains Mg(OH)2 and Al(OH)3
in a 1:1 molar ratio. The antacid was neutralized with an excess of 0.500 M HCl, and the excess HCl was then back titrated with 0.500 M NaOH. The following data was obtained:


Volume of 0.500 M HCl utilized: 38.25 mL
Volume of 0.500 M NaOH utilized: 3.60 mL

Calculate the masses of Mg(OH)2 and Al(OH)3 contained in the antacid.

Answer 1

Mass of Mg(OH)2 -1.057g

Mass of Al(OH)3- 1.42g