This concept covers the equilibrium chemistry of water autoionization and its application to computing pH and pOH for strong acids and bases in aqueous solution. It establishes that the ion product constant of water, Kw (10^-14 at 25°C), is fixed by temperature alone, giving the identity pKw = pH + pOH = 14; pH and pOH are defined as the negative base-10 logarithms of hydrogen ion (hydronium) and hydroxide ion concentration, respectively. Because strong acids and bases dissociate completely (an irreversible, one-directional reaction rather than an equilibrium), their ion concentration equals the nominal molarity, so pH and pOH can be found directly from concentration and then related to each other via the pKw identity and Le Chatelier's Principle. This belongs to acid-base equilibrium chemistry within general/aqueous chemistry, extending prior treatment of equilibrium constants to strong electrolytes.
This concept covers the equilibrium chemistry of water autoionization and its application to computing pH and pOH for strong acids and bases in aqueous solution. It establishes that the ion product c…