Question

PART A:

A 0.130 M solution of a weak base has a pH of 11.28.

Determine Kb for the base.

Express your answer using two significant figures.

PART B:

Morphine is a weak base. A 0.150 M solution of morphine has a pH of 10.5

What is Kb for morphine?

PART C:

Amphetamine (C9H13N) is a weak base with a pKb of 4.2.

Calculate the pH of a solution containing an amphetamine concentration of 210 mg/L