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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: The Molecular Science
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter15: Additional Aqueous Equilibria
Section: Chapter Questions
Problem 93QRT: When 40.00 mL of a weak monoprotic acid solution is titrated with 0.100-M NaOH, the equivalence...
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5. A 100-ml sample of water containing Ca²* and Mg2* 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 CaCO: (100.09) and MgCO3 (84.314) in the sample.
Transcribed Image Text:5. A 100-ml sample of water containing Ca²* and Mg2* 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 CaCO: (100.09) and MgCO3 (84.314) in the sample.
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