Calcium in a 2.00-g sample is determined by precipitating CaC2O4, dissolving this in acid, and titrating the oxalate with 0.0200 M KMnO4. What percent of CaO is in the sample if 35.6 mL KMnO4 is required for titration? (The reaction is 5H2C2O4 + 2MnO4− + 6H+ →10CO2 + 2Mn2+ + 8H2O.)
Calcium in a 2.00-g sample is determined by precipitating CaC2O4, dissolving this in acid, and titrating the oxalate with 0.0200 M KMnO4. What percent of CaO is in the sample if 35.6 mL KMnO4 is required for titration? (The reaction is 5H2C2O4 + 2MnO4− + 6H+ →10CO2 + 2Mn2+ + 8H2O.)
Chapter17: Complexation And Precipitation Reactions And Titrations
Section: Chapter Questions
Problem 17.25QAP
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Calcium in a 2.00-g sample is determined by precipitating CaC2O4, dissolving this in acid,
and titrating the oxalate with 0.0200 M KMnO4. What percent of CaO is in the sample if
35.6 mL KMnO4 is required for titration? (The reaction is
5H2C2O4 + 2MnO4− + 6H+ →10CO2 + 2Mn2+ + 8H2O.)
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