We’re being asked to calculate the pH of a solution the contains 0.24 M NH 3 and 0.20 M NH4Cl.
A solution that contains a weak base and its conjugate acid is a buffer solution. The pH of a buffer solution can be determined using the Henderson-Hasselbalch equation.
The solution is composed of 0.24 M NH 3 and 0.20 M NH4Cl.
• NH 3 is a weak base
• the cation in NH4Cl is the conjugate acid
NH4Cl → NH4+ + Cl-
What is the pH of a buffer solution that is 0.24 M NH 3 and 0.20 M NH4Cl?