Bac PC (Physique-Chimie) Practice Questions - Baccalaureat General - Specialite Physique-Chimie (epreuve Terminale) Exam

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The acid dissociation constant of a couple AH/A- is written Ka. The relationship linking pH and pKa for that couple in solution is the Henderson–Hasselbalch-type relation:

pH = pKa + log([A-]/[AH]) pH = pKa - log([A-]/[AH]) pH = pKa + log([AH]/[A-]) pH = -pKa + log([A-]/[AH])

Correct Answer:

pH = pKa + log([A-]/[AH])

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