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Water Hardness Lab Essay Preview: Water Hardness Lab Report this essay Lab #1: Complexometric Determination of Water Hardness by EDTA TitrationMorganne OBrien and Nika MoussaviDr. Todd WindmanMesa Community CollegeExperiment Date: 02 June 2016AbstractThe purpose of this research is to determine the hardness of an unknown water sample. A disodium EDTA solution will be standardized by.