Buffer Solutions

Buffers are solutions that resist changes in pH when small amounts of acid/base are added or when the buffer is diluted

Acidic Buffer

• Weak acid (eg. ethanoic acid)
• pluis salt of acid, formed from strong base
• pH below 7
• Eg. ethanoic acid and sodium ethanoate

action of buffer dependant on weak acid equilibrium

If too much alkali/acid is added, buffer cannot compensate, therefore pH will change

Acid acts as a source…