CHEM 110 Problem Set Due November 15, 2020
Identify the hybridization of each Carbon atom in the following structure:
Identify the hybridization of each Nitrogen in vitamin (niacinamide):
Use molecular orbital theory to determine which of the following is the most stable (strongest bonding): CN or CN'. Show all your work.
You have been given a sample of well water to test for hardness (presence of Ca2+ and Mg2+). The original sample was 500.00 mL. Unfortunately, the bottle was not sealed well and before you had a chance to do the analysis, some has evaporated. You now have a volume of 350.00 mL. You titrate a 20.00 mL portion of this water with a 0.00100 M EDTA solution. 65.70 mL of EDTA are used in the titration. What was the concentration of Ca2+ and Mg2+ combined in the original 500.00 mL sample of water? Recall that EDTA reacts 1:1 with either Ca2+ or Mg2+. Report your answer in mol/L.