A sample of pure CaCO3 (FW= 100.1 g/mol) weighing 0.350g was dissolved in concentrated HCI (MW= 36.45 g/mol) and diluted to 250mL in a volumetric flask. A 50.0mL aliquot required 35.00mL of an EDTA solution for titration. A 5.0-mL water sample to be analysed for its hardness was diluted to 250mL. A 10.00mL aliquot required 24.50mL of the EDTA solution to reach the EBT endpoint. 1. Calculate the molarity of the EDTA solution. 2. Calculate the water hardness in pm CaCO3.

A sample of pure CaCO3 (FW= 100.1 g/mol) weighing 0.350g was dissolved in concentrated HCI (MW= 36.45 g/mol) and diluted to 250mL in a volumetric flask. A 50.0mL aliquot required 35.00mL of an EDTA solution for titration. A 5.0-mL water sample to be analysed for its hardness was diluted to 250mL. A 10.00mL aliquot required 24.50mL of the EDTA solution to reach the EBT endpoint. 1. Calculate the molarity of the EDTA solution. 2. Calculate the water hardness in pm CaCO3.

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter15: Molecular Luminescence Spectrometry

Section: Chapter Questions

Problem 15.10QAP

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