Solution Chemistry Stoichiometry

Question

In a titration, 350.6 mL of a 1.52 M solution of hydrochloric acid is neutralized by with 0.376 L of magnesium hydroxide. What is the molarity of the base?

Answer 1

The balanced neutralization equation: 2HCl + Mg(OH)₂ ----> MgCl₂ + 2H₂O

mol_HCl = 0.3506 L x 1.52 mol/L = 0.533 mol

For mole of base Mg(OH)₂ : 0.533 mol HCl x 1 mol Mg(OH)₂ / 2 mol HCl = 0.267 mol

molarity of the base Mg(OH)₂ : 0.267 mol / 0.376 L = 0.709 M