220.127.116.11 Buffer action (A-level only)
A buffer solution maintains an approximately constant pH, despite dilution or addition of small amounts of acid or base.
Acidic buffer solutions contain a weak acid and the salt of that weak acid.
Basic buffer solutions contain a weak base and the salt of that weak base.
Applications of buffer solutions.
Students should be able to:
• explain qualitatively the action of acidic and basic buffers
• calculate the pH of acidic buffer solutions.