posted by LT on .
Enough water is added to 0.35 g of benzoic acid to make 1000 mL of solution. What is the pH?
Ionization Constant for Benzoic Acid Ka = 6.5 × 10–5
Molar Mass Benzoic Acid 122. g·mol–1
(A) 1.9 (B) 2.6 (C) 3.4 (D) 4.2
A straight Ksp problem. You need to convert 0.35 g benzoic acid to mols. mols = g/molar mass.