A 3.7145 g portion of disodium EDTA dihydrate (M. W. 372.24) was dissolved in enough distilled water of prepare 1.000 L of solution. A 100.0 mL water sample was adjusted to pH 10 and titrated to the Eriochrome Black T end point with 11.23 mL of the EDTA solution. When the pH of another 100.0 mL water sample was adjusted to pH 12 and titrated with EDTA, 2.11 mL of titrant was required. Calculate the concentration of Ca(II) and Mg(II) in the water. Express the answers in mg/L of CaCl2 and MgSO4, respectively.