Neco 2023 Chemistry Question 42
Practice objective / multiple choice question 42 from the 2023 Neco Chemistry examination.
A 5.00 g sample of a solid mixture containing calcium carbonate (CaCO\(_3\)) and sodium carbonate (Na\(_2\)CO\(_3\)) is treated with excess hydrochloric acid. Both carbonates react according to: \(\text{CaCO}_3 + 2\text{HCl} \rightarrow \text{CaCl}_2 + \text{CO}_2 + \text{H}_2\text{O}\) and \(\text{Na}_2\text{CO}_3 + 2\text{HCl} \rightarrow 2\text{NaCl} + \text{CO}_2 + \text{H}_2\text{O}\). The total mass of carbon dioxide gas collected is 2.12 g. Determine the mass percentage of CaCO\(_3\) in the original mixture.
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About This Question
This is Neco 2023 Chemistry Question 42. It is one of the objective questions from the 2023 Neco Chemistry examination.
Difficulty level: Medium .
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