4) 60 mg sample is taken from the impure CaCO3 and dissolved in the precipitate CaC2O4 in neutral medium and the precipitated is filtered. content. Then the excess amount of (NH4)2C2O4 solution is added to water in acidic medium. The solution is heated to remove CO2 precipitate CaC204 in neutral medium and the precipitated is filtered Ca+ + C202 → CaC,O«(s) Both the precipitate and the filter paper are taken into an Erlen flask and 150 mL water is added. The medium is acidified to dissolve the precipitate. Then this sample is titrated with 12 mL 0.0198 M KMNO4 solution. 2Mr Mno. +C.0. (unbalanced, in acidic) MnO4 →2 Mn +1co2 According to these, what is the mass percent of Ca in the 60 mg sample? (For filter paper titration, 0.5 mL KMNO4 is consumed) (Ca:40 g/mole)

4) 60 mg sample is taken from the impure CaCO3 and dissolved in the precipitate CaC2O4 in neutral medium and the precipitated is filtered. content. Then the excess amount of (NH4)2C2O4 solution is added to water in acidic medium. The solution is heated to remove CO2 precipitate CaC204 in neutral medium and the precipitated is filtered Ca+ + C202 → CaC,O«(s) Both the precipitate and the filter paper are taken into an Erlen flask and 150 mL water is added. The medium is acidified to dissolve the precipitate. Then this sample is titrated with 12 mL 0.0198 M KMNO4 solution. 2Mr Mno. +C.0. (unbalanced, in acidic) MnO4 →2 Mn +1co2 According to these, what is the mass percent of Ca in the 60 mg sample? (For filter paper titration, 0.5 mL KMNO4 is consumed) (Ca:40 g/mole)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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