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pKb is a measure of basicity or alkalinity. It's defined as the negative logarithm (base 10) of base dissociation constant (Kb). A lower pKb value indicates a stronger base.
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Base Dissociation Constant (Kb): This measures how readily a base accepts protons from water molecules when it dissolves.
Hydroxide Ion Concentration [OH-]: Refers to how many hydroxide ions are present in a solution after a base has accepted protons.
pOH: This is another way to measure basicity or alkalinity, based on the concentration of hydroxide ions. Lower pOH values indicate higher basicity.