AP Chemistryeasymcq1 pt
Which base produces TWO moles of OH⁻ per mole dissolved through complete dissociation in water?
A.NaOH
B.KOH
C.Ba(OH)₂
D.NH₃
Explanation
Core Concept
Ba(OH)₂ holds two hydroxide ions per formula unit and, as a strong base, separates completely in water. Each mole therefore delivers two moles of OH⁻, doubling its effect on pOH compared with NaOH or KOH. NH₃ never dissociates at all; it generates hydroxide partially by accepting protons from water.
Correct Answer
CBa(OH)₂
More Unit 8: Acids and Bases practice questions
- mediumWhich mixture produces a buffer with pH closest to 9.0?
- mediumFor a weak acid, which approximation allows skipping the quadratic?
- mediumWhat is the pH of a solution after 0.0050 mol of HCl is added to 1.0 L of pure water?
- mediumIn the reaction HSO₄⁻ + H₂O ⇌ SO₄²⁻ + H₃O⁺, which species acts as a base?
- easyWhich of the following is the strongest base?
Practice more AP Chemistry questions with full explanations
Practice Unit 8: Acids and Bases Questions →