A 35.0 mL of 1.00 x10–2 M Ca2+ was titrated with 0.0250 M EDTA at a pH of 10 and in the presence of 0.0500 M NH3. The formation constant for Ca2+–EDTA is 4.5 x1010. *αY4– = 0.35 at a pH 10; αCa2+ = 0.969 when the concentration of NH3 is 0.0500 M. Calculate the pCa (20pts) a.) Before equivalence point b.) At equivalence point

A 35.0 mL of 1.00 x10–2 M Ca2+ was titrated with 0.0250 M EDTA at a pH of 10 and in the presence of 0.0500 M NH3. The formation constant for Ca2+–EDTA is 4.5 x1010. *αY4– = 0.35 at a pH 10; αCa2+ = 0.969 when the concentration of NH3 is 0.0500 M. Calculate the pCa (20pts) a.) Before equivalence point b.) At equivalence point

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter17: Complexation And Precipitation Reactions And Titrations

Section: Chapter Questions

Problem 17.3QAP

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