A 100.00 mL sample water of unknown source was diluted to 250.00 mL total volume. A 50.00 mL aliquot of this stock solution was titrated with 0.004000 M EDTA solution. The hardness of the water in ppm (mg/L) CaCO3 (MM = 100.09) in the original sample is 321.0 ppm. What is the volume (in mL) of EDTA used?

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Basic Chemical Calculations (Process and Variables)

A basic chemical calculation involves the application of the law of chemical proportions to various reactions and material and energy balance calculations on various chemical processes. Basic chemical calculation helps students analyze various chemical processes and develop problem-solving skills. The chemical manufacturing processes are divided into unit operations involving physical changes of material and unit processes involving the chemical transformation of materials. For instance, fluid flow, heat transfer, and mass transfer are unit operations, and oxidation, reduction, and pyrolysis are unit processes.