Making Buffers (AQA A-Level Chemistry): Flashcards

Resist pH changes when small amounts of acid/base added

Weak acid + conjugate base OR weak base + conjugate acid

$pH = pK_a + \log(\frac{[\text{salt}]}{[\text{acid}]})$

4.75

4.75

2.05 g

25 cm³ NaOH + 50 cm³ ethanoic acid

250 cm³

0.5:1

1 cm³ of 1.0 mol dm⁻³ to 100 cm³ buffer