A-LevelChemistryEquilibriaOct/Nov 2023Paper 4 Q211 Marks
Benzoic acid, C6H5COOH, is a weak acid. The K₂ of benzoic acid is 6.31 × 10–5 moldm-3 at 298 K. A 1.00dm³ buffer solution is made at 298 K containing 1.00g of C6H5COOH and a slightly greater mass of sodium benzoate, C6H5COO¯Na*. This buffer solution has a pH of 4.15.
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