Brønsted-Lowry acids and bases, conjugate pairs, acid strength and Ka

What this note covers

1. Three models of acids: Davy, Arrhenius and Brønsted-Lowry
2. Proton donors and acceptors: writing proton-transfer equations
3. Conjugate acid–base pairs and amphiprotic species
4. Monoprotic and polyprotic acids
5. Strength versus concentration: the degree of ionisation
6. The acidity constant, Ka
7. Evidence for strength, and the equations that go with it
8. How this topic is examined and what separates a top answer

8 sections · 12 key terms & formulas · 6 common mistakes