A 0.2054 g sample of CaCO, (primary standard) is dissolved in hydrochloric acid andthe solution is diluted with water to 250.0 mL (solution A). A 50.0 mL aliquot ofsolution A is titrated with 41.12 ml of EDTA solution.a) Calculate the molarity of the EDTA solution.A 100.0 ml sample of water containing Ca2* and Mg?* is treated with NaOH toprecipitate out Mg2* as Mg(OH)2, and solution is then titrated at pH 13 with 15.86 mLof the EDTA solution. Another 100.0 mL of the water sample is titrated with 22.74 mLof the EDTA solution at pH = 10.00.b) Calculate the ppm (mg/L) of CaCOz in the sample.c) Calculate the ppm MgCO3 in the sample.

Ca2++EDTA →Cu2+EDTA2- complexation reaction* Primary standards, Moles of CaCO3 = 0.2054 gm100…

A 0.2054 g sample of CaCO, (primary standard) is dissolved in hydrochloric acid and the solution is diluted with water to 250.0 mL (solution A). A 50.0 ml aliquot of solution A is titrated with 41.12 mL of EDTA solution. a) Calculate the molarity of the EDTA solution. A 100.0 mL sample of water containing Ca2+ and Mg2* is treated with NaOH to precipitate out Mg2* as Mg(OH)2, and solution is then titrated at pH 13 with 15.86 mL of the EDTA solution. Another 100.0 mL of the water sample is titrated with 22.74 ml of the EDTA solution at pH = 10.00. b) Calculate the ppm (mg/L) of CaCOz in the sample. c) Calculate the ppm MGCO; in the sample.

A 0.2054 g sample of CaCO, (primary standard) is dissolved in hydrochloric acid and the solution is diluted with water to 250.0 mL (solution A). A 50.0 ml aliquot of solution A is titrated with 41.12 mL of EDTA solution. a) Calculate the molarity of the EDTA solution. A 100.0 mL sample of water containing Ca2+ and Mg2* is treated with NaOH to precipitate out Mg2* as Mg(OH)2, and solution is then titrated at pH 13 with 15.86 mL of the EDTA solution. Another 100.0 mL of the water sample is titrated with 22.74 ml of the EDTA solution at pH = 10.00. b) Calculate the ppm (mg/L) of CaCOz in the sample. c) Calculate the ppm MGCO; in the sample.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter13: Titrations In Analytical Chemistry

Section: Chapter Questions

Problem 13.28QAP

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