pOH
chapter 6
lesson 7
Objective
You will be able to calculate the
pOH of a solution given the
concentration
Basic Solution
pH
pOH
Sometimes you are asked for the pOH of a
solution, rather than the pH. The calculations
are almost identical.
The formula is still a logarithmic one.
pOH=-log[OH-]
It is important to understand that for all
aqueous solutions at SATP, pH + pOH = 14.
Example 1
A solution has a pH of 4.5. Calculate the pOH.
Example 2
A solution of sodium hydroxide has
a concentration of 0.0500 mol/L.
What is the pOH? What is the pH?
Example 3
What is the pH of a 2.51x10-5 mol/L
solution of ammonia?
Example 4
The maximum solubility of barium hydroxide
at 20˚C is 3.8 g/100 mL. What is the pOH
of this solution? We will assume that all of the barium
hydroxide dissociates under these conditions.
Assignment
Read p. 230-237
Do p.237 all