Conjugate Acid-Base Pair
| Formula / Notation | pKa + pKb = pKw = 14 |
|---|---|
| Also Known As | Brønsted conjugate pair, acid-base pair, proton donor-acceptor pair |
What is Conjugate Acid-Base Pair?
A conjugate acid-base pair consists of two species related by the gain or loss of a single proton (H⁺). The conjugate base is formed when an acid loses a proton; the conjugate acid is formed when a base gains a proton. For example, CH₃COOH and CH₃COO⁻ are a conjugate pair. Strong acids have weak conjugate bases, and vice versa.
Formula & Notation
Other Names / Synonyms: Brønsted conjugate pair, acid-base pair, proton donor-acceptor pair
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
A conjugate acid-base pair consists of two species related by the gain or loss of a single proton (H⁺). The conjugate base is formed when an acid loses a proton; the conjugate acid is formed when a base gains a proton. For example, CH₃COOH and CH₃COO⁻ are a conjugate pair. Strong acids have weak conjugate bases, and vice versa.
Conjugate acid-base pair concepts are used in buffer design, titration analysis, and understanding biological proton-transfer reactions. The Henderson-Hasselbalch equation describes buffer pH in terms of the pKa and the ratio of conjugate base to acid.
Understanding conjugate pairs is essential for predicting the behaviour of acid and base solutions: weak acids in concentrated form are still capable of releasing significant H⁺. Working with any acidic or basic solutions requires appropriate PPE.
The formula or notation for Conjugate Acid-Base Pair is: pKa + pKb = pKw = 14