The Brønsted–Lowry Definitions
The Brønsted–Lowry Definitions
At GCSE, you learned that acids release H+\text{H}^+H+ ions and alkalis release OH−\text{OH}^-OH− ions. In 1923, chemists Johannes Nicolaus Brønsted and Thomas Martin Lowry independently proposed a more powerful model focused entirely on the transfer of H+\text{H}^+H+ ions between molecules.
Step-by-step lessons on AQA A Level Chemistry Brønsted–Lowry acid–base equilibria in aqueous solution (A-level only). Each one builds up to exam-style questions. Build confidence with atomic structure, bonding and moles calculations early on, since these underpin the more demanding organic mechanisms, equilibrium and practical-analysis topics that dominate Year 2.