When an acid dissolves in water, it donates a hydrogen ion (H+) to the water molecule. The more hydrogen ions that an acid donates, the higher its acidity. Conversely, when a base dissolves in water, it accepts a hydrogen ion from the water molecule. The more hydrogen ions that a base accepts, the higher its basicity.
The strength of an acid or base can be measured using a pH scale. The pH scale ranges from 0 to 14, with 7 being neutral. A pH below 7 indicates an acidic solution, while a pH above 7 indicates a basic solution.
The following are some examples of strong acids and bases:
Strong acids:
- Hydrochloric acid (HCl)
- Sulfuric acid (H2SO4)
- Nitric acid (HNO3)
Strong bases:
- Sodium hydroxide (NaOH)
- Potassium hydroxide (KOH)
- Calcium hydroxide (Ca(OH)2)
Weak acids and bases are those that do not completely dissociate in water. Some examples of weak acids and bases include:
Weak acids:
- Acetic acid (CH3COOH)
- Carbonic acid (H2CO3)
- Hydrofluoric acid (HF)
Weak bases:
- Ammonia (NH3)
- Sodium bicarbonate (NaHCO3)
- Calcium carbonate (CaCO3)
