Waec Model Questions Vol1 2020 Chemistry Question 29
Practice objective / multiple choice question 29 from the 2020 Waec Model Questions Vol1 Chemistry examination.
A 3.00 g sample of a solid mixture containing sodium carbonate (Na₂CO₃) and potassium carbonate (K₂CO₃) is dissolved in excess hydrochloric acid. The carbon dioxide released is collected over water at 25 °C and 750 mmHg. The volume of dry CO₂ measured is 0.660 L. (Water vapour pressure at 25 °C = 23.8 mmHg.) Determine the mass percent of Na₂CO₃ in the original mixture. Give your answer to one decimal place.
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About This Question
This is Waec Model Questions Vol1 2020 Chemistry Question 29. It is one of the objective questions from the 2020 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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