Gce Model Questions Vol1 2021 Chemistry Question 5
Practice essay / theory question 5 from the 2021 Gce Model Questions Vol1 Chemistry examination. This question covers Stoichiometry, Limiting reagent, Moles, Percent yield .
A sample of a mixed solid containing calcium carbonate (CaCO₃) and magnesium carbonate (MgCO₃) is treated with excess hydrochloric acid (HCl). The reaction proceeds according to: \n\nCaCO₃(s) + 2HCl(aq) → CaCl₂(aq) + CO₂(g) + H₂O(l)\nMgCO₃(s) + 2HCl(aq) → MgCl₂(aq) + CO₂(g) + H₂O(l)\n\nA 5.00 g sample of the mixed carbonate is completely reacted with 150 mL of 0.80 mol L⁻¹ HCl. After the reaction, the gaseous CO₂ is collected over water at 25 °C and a pressure of 760 mm Hg; the volume of dry CO₂ collected is 2.45 L. The mass of the solution remaining after filtration is 85.0 g. The molar masses are: CaCO₃ = 100.09 g mol⁻¹, MgCO₃ = 84.31 g mol⁻¹, HCl = 36.46 g mol⁻¹, CaCl₂ = 110.98 g mol⁻¹, MgCl₂ = 95.21 g mol⁻¹.\n\nAnswer the following:
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This is Gce Model Questions Vol1 2021 Chemistry Question 5. It is one of the essay questions from the 2021 Gce Model Questions Vol1 Chemistry examination.
The question covers Stoichiometry, Limiting reagent, Moles, Percent yield .
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