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You are given a sample of limestone, which is mostly CaCO3, to determine the mass percentage of Ca in the rock. You dissolve the limestone in hydrochloric acid, which gives a solution of calcium chloride. Then you precipitate the calcium ion in solution by adding sodium oxalate, Na2C2O4. The precipitate is calcium oxalate, CaC2O4. You find that a sample of limestone weighing 128.3 mg gives 140.2 mg of CaC2O4. What is the mass percentage of calcium in the limestone?
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Chapter 4 Solutions
Bundle: General Chemistry, Loose-Leaf Version, 11th + LabSkills PreLabs v2 for Organic Chemistry (powered by OWLv2), 4 terms (24 months) Printed ... for Ebbing/Gammon's General Chemistry, 11th
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