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 one of the objective questions from the 2017 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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