5.1 buffers Flashcards
1
Q
what is a buffer solution?
A
a buffer solution is a mixture that minimises pH changes on addition of small amounts of acid or base
2
Q
what is an acidic buffer solution a mixture of?
A
an acidic buffer solution is a mixture of:
- a weak acid, HA
- its conjugate base A-
3
Q
what happens to the salt?
A
the salt fully disassociates into its ions when it dissolves
4
Q
what happens to the weak acid?
A
the weak acid partially diassociates
5
Q
what are the two ways of setting up an equilibrium between a weak acid and its conjugate base?
A
the two ways of setting up an equilibrium between a weak acid and its conjugate base:
- mixing a weak acid with the salt of its conjugate base
- mixing an excess of a weak acid with a strong alkali
