What should the molar concentrations of benzoic acid and, Ask an Expert

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What should the molar concentrations of benzoic acid and sodium benzoate be in a solution that is buffered at a pH of 4.55 and has a freezing point of -2.0 °C. (Assume complete dissociation of sodium benzoate and a density of 1.01 g/mL for the solution.)

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