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  • 07-11-2022
  • Chemistry
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A solution is prepared by dissolving sodium benzoate and benzoic acid in water to give a 9 mmol/litre concentration of each compound. The mixture has a pH of 4.21 at 25oC. Calculate the acid dissociation constant of benzoic acid, Ka.
Hint: pH = pKa + log10 ·[sodium benzoate] / [benzoic acid]

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