Chapter summary
Theories of Acids and Bases, at a glance
Follow protons, calculate strong-solution pH and explain how buffers respond to change.
A-Level 8873, revised syllabus (2026-2027)
Quick revision
Revisit the essentials, then return to an explanation when you need it.
| Task | Method |
|---|---|
| Identify conjugate pairs | Species differ by one H+ and one unit of signed charge. |
| Calculate strong-acid pH | Count H+ per formula unit; find concentration; use -log10[H+]. |
| Calculate strong-base pH | Count OH-; use [H+] = Kw/[OH-]; then the logarithm. |
| Mix strong acid and alkali | Neutralise moles first; divide excess by total volume. |
| Choose an indicator | Its transition must lie in the steep supplied pH interval. |
| Explain buffering | Name the component that consumes the added H+ or OH-. |