How Is Base Strength Measured with pKb?

💡 The Answer

• Base strength is quantified by the pKb value, which is the negative logarithm of the base dissociation constant Kb.
• A smaller pKb indicates a stronger base, as it means the base more readily accepts protons.
• For strong bases like sodium hydroxide, pKb is infinitely negative because they dissociate completely.
• Weak bases like ammonia have measurable pKb values (around 4.75), reflecting their partial ionization.