The weak base methylamine, CH3NH2, has Kb= 4.2 x 10-4 . It reacts with water according to the equation. CH3NH2(aq) + H2O(ℓ) ⇌ CH3NH3+(aq) + OH-(aq) Calculate the equilibrium hydroxide ion concentration in a 0.25 M solution of the base. What are the pH and pOH of the solution?

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter14: Acids And Bases
Section: Chapter Questions
Problem 30QRT
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The weak base methylamine, CH3NH2, has Kb= 4.2 x 10-4 . It reacts with water according to the equation.

CH3NH2(aq) + H2O(ℓ) ⇌ CH3NH3+(aq) + OH-(aq)

Calculate the equilibrium hydroxide ion concentration in a 0.25 M solution of the base. What are the pH and pOH of the solution?

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