A base is a substance that can accept protons.
They have a pH reading of above 7.
In water, bases form OH- ions, meaning they react with acids to form water.
The Brønsted - Lowry theory of Acids and BasesEdit
- A neutralisation reaction is when a acid and a base react together to create a salt and water:
This can be remembered as BAWS
Strong and Weak basesEdit
The 'strength' of an base is whether it completely dissociates (or ionises) when dissolved in water (forming OH- ions) . Bases which totally dissociate are called strong bases, while ones where some molecules remain un-ionised are called weak bases.
An alkali is a base that is able to dissolve in water. All alkalis are are bases, but not all bases are alkalis.