Gce Model Questions Vol1 2023 Chemistry Question 40
Practice objective / multiple choice question 40 from the 2023 Gce Model Questions Vol1 Chemistry examination.
A student carries out the following sequence starting from 5.00 g of benzoic acid (\(\ce{C7H6O2}\), M = 122.12 g·mol⁻¹):\n1. Convert the acid to its acid chloride using excess thionyl chloride (quantitative).\n2. React the acid chloride with excess ethanol to give ethyl benzoate (\(\ce{C9H10O2}\), M = 150.17 g·mol⁻¹) with an isolated yield of 85 %.\n3. Hydrolyse the ester back to benzoic acid with aqueous NaOH, giving a 90 % yield based on the ester used.\nCalculate the mass of benzoic acid recovered after the three steps.
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This is Gce Model Questions Vol1 2023 Chemistry Question 40. It is one of the objective questions from the 2023 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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