5. A 100-mL sample of water containing Ca?* and Mg?* ions is titrated with 15.28 ml of 0.01016 M EDTA in an ammonia buffer at pH 10.00. Another sample of 100 ml is treated with NaOH to precipitate Mg(OH)2, and then titrated at pH 10.00 with 10.43 mL of the same EDTA solution. Calculate the conc in ppm of CaCO3 (100.09) and MGCO3 (84.314) in the sample.

5. A 100-mL sample of water containing Ca?* and Mg?* ions is titrated with 15.28 ml of 0.01016 M EDTA in an ammonia buffer at pH 10.00. Another sample of 100 ml is treated with NaOH to precipitate Mg(OH)2, and then titrated at pH 10.00 with 10.43 mL of the same EDTA solution. Calculate the conc in ppm of CaCO3 (100.09) and MGCO3 (84.314) in the sample.

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

Chapter4: Stoichiometry: Quantitative Information About Chemical Reactions

Section4.9: Spectrophotometry

Problem 3.1ACP

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