Waec Model Questions Vol1 2022 Chemistry Question 50

Practice objective / multiple choice question 50 from the 2022 Waec Model Questions Vol1 Chemistry examination.

Waec Model Questions Vol1 2022 Chemistry Objective / Multiple Choice Medium Difficulty
Question 50 WAEC_MODEL_QUESTIONS_VOL1 • 2022 • CHEMISTRY • objective

Ethanol (C₂H₅OH) reacts with sodium metal according to 2 C₂H₅OH + 2 Na → 2 C₂H₅ONa + H₂. (a) If 5.00 g of ethanol reacts with excess Na, calculate the volume of H₂ produced at STP. (b) The ethoxide formed is then reacted with carbon dioxide: 2 C₂H₅ONa + CO₂ → C₂H₅OCOONa + Na₂CO₃. Assuming an overall 80 % yield for this step, determine the mass of Na₂CO₃ obtained.

Answer Options

A. H₂ volume = 0.95 L; Na₂CO₃ mass = 5.00 g
B. H₂ volume = 1.35 L; Na₂CO₃ mass = 4.10 g
C. H₂ volume = 1.10 L; Na₂CO₃ mass = 5.20 g
Correct Answer D. H₂ volume = 1.22 L; Na₂CO₃ mass = 4.60 g
Correct Answer
D
Correct Option:
H₂ volume = 1.22 L; Na₂CO₃ mass = 4.60 g

About This Question

This is Waec Model Questions Vol1 2022 Chemistry Question 50. It is one of the objective questions from the 2022 Waec Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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