3.1.12.6 Buffer Action Flashcards
1
Q
What are buffer solutions?
A
Solutions which resist changes in pH when small amounts of acid / base are added
In the solution there must be lareg amounts of the base and acid for the buffer to work effectively
2
Q
What are acidic buffers?
A
Weak acids
pH is lower than 7
3
Q
What are alkali buffers?
A
Solutions of weak bases and conjugate acids
pH is higher than 7
4
Q
What does the pH at which a buffer operates depend on?
A
The pka of the acidic component present
5
Q
How do you work out the pKa value?
A
pKa = -log 10 (Ka) Ka = 10 to the power of (-pKa)
