Waec Model Questions Vol1 2020 Chemistry Question 21
Practice objective / multiple choice question 21 from the 2020 Waec Model Questions Vol1 Chemistry examination.
A 12.0 g sample of pure malonic acid (HOOC‑CH2‑COOH, molar mass 118.09 g·mol⁻¹) is esterified with excess ethanol in the presence of concentrated H₂SO₄ according to: HOOC‑CH₂‑COOH + 2 C₂H₅OH → CH₃CH₂OOC‑CH₂‑COOCH₂CH₃ + 2 H₂O. If the reaction gives 78% isolated yield of diethyl malonate, calculate (a) the mass of diethyl malonate obtained and (b) the percent by mass of water formed relative to the original malonic acid sample.
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About This Question
This is Waec Model Questions Vol1 2020 Chemistry Question 21. It is a objective / multiple choice question from the 2020 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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