Waec Model Questions Vol1 2023 Chemistry Question 13
Practice objective / multiple choice question 13 from the 2023 Waec Model Questions Vol1 Chemistry examination.
A 2.00 g mixture of benzoic acid (C₇H₆O₂, M = 122.12 g mol⁻¹) and salicylic acid (C₇H₆O₃, M = 138.12 g mol⁻¹) is dissolved in 250 mL of 0.060 M NaOH. After complete neutralisation, the excess NaOH is back‑titrated with 0.060 M HCl, requiring 0.50 mL of the acid to reach the phenolphthalein endpoint. Calculate the mass percent of benzoic acid in the original mixture. Give your answer to one decimal place.
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About This Question
This is Waec Model Questions Vol1 2023 Chemistry Question 13. It is one of the objective questions from the 2023 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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