Waec Model Questions Vol1 2017 Chemistry Question 10
Practice objective / multiple choice question 10 from the 2017 Waec Model Questions Vol1 Chemistry examination.
A 10.0 g sample containing only CaCO₃ and Na₂CO₃ is treated with excess HCl. The CO₂ gas evolved is collected over water at 25 °C and 760 mmHg, and its volume is measured as 2.40 L. (Vapour pressure of water at 25 °C = 23.8 mmHg.) Determine the mass percent of CaCO₃ in the original mixture.
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About This Question
This is Waec Model Questions Vol1 2017 Chemistry Question 10. It is a objective / multiple choice question from the 2017 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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