Linked from

The 19 pages that link to pKa, each with the reason it gives.

• Buffer solutionRelated: A buffer’s most effective pH is near this value for its weak acid.

• Acid–base equilibriumRelated: Comparing pH with pKa indicates whether acid or conjugate base predominates.

• Local anestheticRelated: A drug's pKa helps determine how much is uncharged and able to cross nerve membranes at tissue pH.

• Henderson–Hasselbalch equationRelated: At pH equal to pKa, the conjugate base and acid have equal activities.

• Carboxyl groupRelated: A carboxylic acid’s pKa quantifies how readily its carboxyl group donates a proton.

• Proton transferRelated: Comparing pKa values helps predict which side of a proton-transfer equilibrium is favored.

• ProtonationRelated: Comparing pH with pKa predicts the favored protonation state in many solutions.

• Conjugate acidRelated: A conjugate acid's pKa summarizes its tendency to donate a proton.

• Strong acidRelated: Its value provides a convenient scale for comparing acid strengths in a specified solvent.

• Isoelectric pointRelated: Each ionizable group’s pKa helps determine the pH range over which its charge changes.

• DeprotonationRelated: Comparing pKa values predicts which site or species is more readily deprotonated.

• Acid strengthRelated: It expresses acid strength on a convenient scale: lower pKa generally means stronger acid in the same solvent.

• Malonic acidNarrower topic: The central methylene proton is more acidic than an ordinary alkane proton because both carboxyl groups stabilize its conjugate base.

• Amino groupRelated: The pKa of a conjugate acid helps predict how much an amino group is protonated.

• HistidineRelated: Histidine’s side-chain pKa is close enough to physiological pH for proton exchange in proteins.

• Organic acidRelated: It provides a standard quantitative measure for comparing organic-acid strength.

• GuanidineRelated: The pKa of guanidinium quantifies how strongly guanidine binds a proton.

• E1cB elimination reactionRelated: Relative pKa values help assess whether deprotonation can form the intermediate.

• Non-nucleophilic baseRelated: Conjugate-acid pKa values help compare base strength under specified conditions.