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.

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.