Here are some examples:

* Strong bases: These completely dissociate in water, releasing a large amount of hydroxide ions. Examples include sodium hydroxide (NaOH), potassium hydroxide (KOH), and calcium hydroxide (Ca(OH)2).

* Weak bases: These partially dissociate in water, releasing a smaller amount of hydroxide ions. Examples include ammonia (NH3) and sodium bicarbonate (NaHCO3).

* Basic solutions: Solutions with a pH greater than 7 are considered basic and contain a higher concentration of hydroxide ions than hydronium ions (H3O+).

Key takeaway: A high concentration of hydroxide ions indicates a basic solution.