Strength of Acids
- A strong acid is defined as an acid that dissociates (or ionises1) fully.
A weak acid is one that does not dissociate (or ionise) fully.
- A strong acid will be a better conductor of electricity than a weak acid at the same concentration and at the same temperature.
- A strong acid will have a lower pH than a weaker acid at the same concentration and at the same temperature.
- There are very few stong acids.
Common in School Labs Not Common in School Labs Sulfuric acid (H2SO4)
Hydrochloric acid (HCl)
Nitric acid (HNO3)
Hydrobromic acid (HBr)
Hydroiodic acid (HI)
Perchloric acid (HClO4)
- If you come across an acid you don't know, it is most likely to be a weak acid!