Ok, so I understand the relationships between the basic forms of acid/base equilbriums: KW=(Ka)(Kb) Kw being the ionization constant of water, with Ka,and Kb being the ionization constants for acids and bases respectively. Then there's pKW = pH + pOH However I get confused when I get to pKa and pKb. I can't really wrap my head around what exactly these mean. It's a similar story with pH and pOH. All I know is that they're a numeric measure of acidity or basic properties, and their mathematic definition as the negative log of the concentration of hydronium/hydroxide respectively. How do pKa and pKb relate back to everything else? Also could I get a better definition of pH/pOH, or is my definition good enough?