1. Calculate the Molarity (M) of an EDTA solution if 3.722 g ofNa₂EDTA2H₂O are dissolved in 1.0 L of water.(Na₂EDTA2H₂O, MM = 372.24 g/mole) Show yourwork!

a) A 5.00 mL tap water sample was measured out with a volumetricpipette, and added to a 25 mL Erlenmeyer flask. It was thentitrated with a 0.0100 M Na₂EDTA2H₂O solutionand found to take 0.0635 mL of the EDTA solution to reach the blueendpoint.

- How many moles of the 0.0100 MNa₂EDTA2H₂O were added in the titrationreaction? Show calculations.

- How many moles of calcium ions were reacted? Showcalculations.

b) What is the concentration of the calcium ions in the originaltap water sample in question a, in terms of Molarity (M)? Show thecalculation.

c) What is the concentration of calcium ions in the tap watersample in question b above, in units of parts per million?

- Assuming the main source of calcium ions is CaCO₃,use the molar concentration of Ca²⁺ to calculate themolar concentration of CaCO₃ and the concentration ofCaCO₃ in ppm.

d) Determine the number of grams of calcium chloride (weighed asCaCl₂2H₂O) are needed to make 100 mL of 0.010M Ca²⁺ solution.