Chemistry › Section O · Other equilibria › Topic O.3
Coupled equilibria
Real solutions rarely hold just one equilibrium. When two equilibria share a species, a change in one is passed on to the other, which is how ammonia dissolves silver chloride, how acids attack tooth enamel and how extra carbon dioxide threatens shell-building sea life.
In this topic
- Equilibria that share a species
- How the coupling works
- Worked example: dissolving silver chloride in ammonia
- Worked example: why ammonia cannot rescue silver iodide
- Photographic fixing
- Acids dissolve salts of basic anions
- Aluminium hydroxide: dissolving both ways
- Acid, sugar and tooth enamel
- Oceans, carbon dioxide and shells
- Common mistakes to avoid
- Key takeaways
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