Answer and Explanation:
pOH is a measure of alkalinity, or how basic a solution is.
This can be found using the formula:
[tex]\rm pOH = -\log[OH^-][/tex]
where [tex][\rm OH^-][/tex] is the solution's concentration of hydroxide ions.
Plugging in the given concentrations, we get:
[tex]\rm pOH=-log(10^{-6}\ M) = 6[/tex]
[tex]\rm pOH = -\log(5\cdot 10^4\ M) \approx -6.7[/tex]
