a. A student performed Part 3 of the lab. A 360 ppm Ca2+standard required 22.34 mL of EDTA to reach the end point. Somewell water from my grandma’s farm required 15.47 mL of EDTA. Byproportionality to the 360 ppm standard, determine the totalconcentration of Ca2+ (in ppm) in my grandma’s well water?
b. What is the molarity of Ca2+ in the well water? (ppm standsfor parts per million. 100 ppm Ca2+ represents 100 grams of Ca2+ in1,000,000 grams of solution. Assume that the density of thesolution is 1.00g/mL).
c. If the daily recommended amount of calcium in an adult’s (age19 – 50) diet is 1,000 mg, how many liters of water would you needto consume to fully meet your daily calcium needs? (Seehttp://www.nlm.nih.gov/medlineplus/ency/article/002412.htm forreference information.)
