A 15.00 mL urine specimen containing Ca2+ and Mg2+ was diluted to 2.000 L. A 10.00mL sample was taken and buffered to a pH of 10 and required 27.32 mL of 0.003960 MEDTA to react with 'all' the Ca²+ and Mg2+. A second 10.00 mL sample was taken andall the Ca²+ was precipitated as Ca(C204)(s). The Ca(C2O4) (s) precipitate was then takenand dissolved in 18.00 mL of water, buffered to a pH of 10, and required 12.21 mL of0.003960 M EDTA solution to react with all the Ca2+. Calculate the concentration of Ca²+and Mg2+ in the original urine specimen.

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A 15.00 mL urine specimen containing Ca2+ and Mg2+ was diluted to 2.000 L. A 10.00 mL sample was taken and buffered to a pH of 10 and required 27.32 mL of 0.003960 M EDTA to react with 'all' the Ca²+ and Mg2+. A second 10.00 mL sample was taken and all the Ca²+ was precipitated as Ca(C204) (s). The Ca(C204) (s) precipitate was then taken and dissolved in 18.00 mL of water, buffered to a pH of 10, and required 12.21 mL of 0.003960 M EDTA solution to react with all the Ca2+. Calculate the concentration of Ca²+ and Mg2+ in the original urine specimen.

A 15.00 mL urine specimen containing Ca2+ and Mg2+ was diluted to 2.000 L. A 10.00 mL sample was taken and buffered to a pH of 10 and required 27.32 mL of 0.003960 M EDTA to react with 'all' the Ca²+ and Mg2+. A second 10.00 mL sample was taken and all the Ca²+ was precipitated as Ca(C204) (s). The Ca(C204) (s) precipitate was then taken and dissolved in 18.00 mL of water, buffered to a pH of 10, and required 12.21 mL of 0.003960 M EDTA solution to react with all the Ca2+. Calculate the concentration of Ca²+ and Mg2+ in the original urine specimen.

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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