Neco 2025 Chemistry Question 22
Practice objective / multiple choice question 22 from the 2025 Neco Chemistry examination.
A 0.350 g sample of a mixture of benzoic acid (C_{6}H_{5}COOH, M = 122.12 g·mol^{-1}) and acetic acid (CH_{3}COOH, M = 60.05 g·mol^{-1}) is dissolved in 50.0 mL of water and titrated with 0.100 M NaOH. The first equivalence point is reached after 12.5 mL of NaOH, and the second equivalence point after a total of 45.0 mL. Given pK_{a} values of benzoic acid = 4.20 and acetic acid = 4.76, determine the mass of benzoic acid in the sample (to three significant figures).
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About This Question
This is Neco 2025 Chemistry Question 22. It is one of the objective questions from the 2025 Neco Chemistry examination.
Difficulty level: Hard .
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