Chemistry - Acids and Bases - Buffer solutions - Henderson-Hasselbalch Equation
3 worked examples using Henderson-Hasselbalch. Show the equation prominently: pH = pKa + log([A⁻]/[HA]). Example 1: 'Calculate pH of a buffer containing 0.1 M CH₃COOH and 0.1 M CH₃COONa. Ka = 1.8×10⁻⁵.' Work: 'pKa = -log(1.8×10⁻⁵) = 4.74. pH = 4.74 + log(0.1/0.1) = 4.74 + log(1) = 4.74 + 0 = 4.74.'