Question 89, Chapter 5 of General Chemistry 11th Edition, by Petrucci. The active ingredients in a particular antacid tablet are aluminum hydroxide, Al(OH)3, and magnesium hydroxide, Mg(OH)2. A 5.00 x 102 mg sample of the active ingredients was dissolved in 50.0 mL of .500 M HCl. The resulting solution, which was still acidic, required 16.5 mL of 0.377 M NaOH for neutralization. What are the mass percentages of Al(OH)3 and Mg(OH)2 in the sample?

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.