50 mL of a water sample is used, and the volume of 0.01M EDTA used is 27.82mL. How many moles of Ca2+ are in the sample, how many moles of Ca2+ are there per liter, how many grams of CaCO3 are there per liter, and what is the water hardness (ppm, mgCaCO3/L Sample)

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50 mL of a water sample is used, and the volume of 0.01M EDTA used is 27.82mL. How many moles of Ca2+ are in the sample, how many moles of Ca2+ are there per liter, how many grams of CaCO3 are there per liter, and what is the water hardness (ppm, mgCaCO3/L Sample)

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