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Resist pH changes when small amounts of acid/base added
Weak acid + conjugate base OR weak base + conjugate acid
pH=pKa+log([salt][acid])pH = pK_a + \log(\frac{[\text{salt}]}{[\text{acid}]})pH=pKa+log([acid][salt])
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
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