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12.) A 2.00g sample of limestone was dissolved in hydrochloric acid and all the calcium present in the sample was converted to Ca²+, oxalate solution, (NH,),C,O̟(ag)» Was added to the solution to precipitate the calcium ions as calcium oxalate, CaC,O̟(s)• The precipitate was filtered, dried and weighed to a constant mass of 2.43g. Determine the percentage by mass of calcium in the limestone sample. (aq)· Excess ammonium

12.) A 2.00g sample of limestone was dissolved in hydrochloric acid and all the calcium present in the sample was converted to Ca²+, oxalate solution, (NH,),C,O̟(ag)» Was added to the solution to precipitate the calcium ions as calcium oxalate, CaC,O̟(s)• The precipitate was filtered, dried and weighed to a constant mass of 2.43g. Determine the percentage by mass of calcium in the limestone sample. (aq)· Excess ammonium

Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter20: Environmental Chemistry-earth's Environment, Energy, And Sustainability
Section20.7: Green Chemistry And Sustainability
Problem 2.1ACP: Assume that a sample of hard water contains 50. mg/L of Mg2+ and 150 mg/L of Ca2+, with HCO3 as the...
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12.) A 2.00g sample of limestone was dissolved in hydrochloric acid and all the calcium present in the sample was converted to Ca²+, oxalate solution, (NH,),C,O(aqo), was added to the solution to precipitate the calcium ions as calcium oxalate, CaC,O4(s). The precipitate was filtered, dried and weighed to a constant mass of 2.43g. Determine the percentage by mass of calcium in the limestone sample. Excess ammonium (aq)•
Transcribed Image Text:12.) A 2.00g sample of limestone was dissolved in hydrochloric acid and all the calcium present in the sample was converted to Ca²+, oxalate solution, (NH,),C,O(aqo), was added to the solution to precipitate the calcium ions as calcium oxalate, CaC,O4(s). The precipitate was filtered, dried and weighed to a constant mass of 2.43g. Determine the percentage by mass of calcium in the limestone sample. Excess ammonium (aq)•
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