An unknown Ca solution was prepared by weighing a 2.122 g sample, dissolving it in HCl and then titrating this unknown Ca2+ solution with 41.72 mL of a 0.1160 M standard EDTA solution to reach the endpoint at pH = 10.00 using Eriochrome Black T indicator. Calculate the % CaO in the sample [MW CaO = 56.08 g/mol; AW Ca = 40.08 g/mol]. The reaction is a 1:1 Ca:EDTA relationship.

An unknown Ca solution was prepared by weighing a 2.122 g sample, dissolving it in HCl and then titrating this unknown Ca2+ solution with 41.72 mL of a 0.1160 M standard EDTA solution to reach the endpoint at pH = 10.00 using Eriochrome Black T indicator. Calculate the % CaO in the sample [MW CaO = 56.08 g/mol; AW Ca = 40.08 g/mol]. The reaction is a 1:1 Ca:EDTA relationship.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter17: Complexation And Precipitation Reactions And Titrations

Section: Chapter Questions

Problem 17.29QAP

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