a 100 ml sample of hard water is titrated with the ETDA solution in problem 2. the volume of EDTA required to reach the end point is 22.44 ml
a. how many moles of EDTA are used i titration= 3.97x10^-4
b. how many moles of Ca2+ ion are there in 100 ml water sample: 3.97x10^-4
c. if the Ca^2+ ion comes from CaCO3 how many moles of CaCO3 are there in 1 l of hard water. How many grams of CaCO3 per liter?