What is the pOH?

Question

Determine the pOH of a 0.500 M CsOH solution at 25°C.

Answer 1

Since CsOH is an ionic compound. When dissolved in water (because it states solution) it breaks apart into Cs⁺ and OH^- . Because the concentration is 0.500M, the mole to mole ratio is 1 mole of CsOH to 1 mole Cs⁺ and 1 mole OH^-. The concentration is then 0.500M for OH^- if you know the concentration, you can determine the pOH by using the following equation. pOH = -log [OH^-]

Plug in the numbers and you have the answer!