Equilibrium constant for ionization

The equilibrium constant for ionization measures how much a substance splits into ions in a solution. It compares the concentration of ions produced to the concentration of the original, un-ionized form at equilibrium. A high value indicates most of the substance has ionized, while a low value means only a small part has. This constant helps us understand chemical behavior, such as strength of acids or bases, by showing how readily molecules give up or accept ions in water, reflecting the balance point between the ionized and non-ionized forms.