Answers to Chapter 14
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26
Vitamin C has numerous polor and H bonding groups so is soluble in water.
Vitamin E has non-polar groups and is fat-soluble and soluble in non-polar solvents.
28
benzoic acid reacts with sodium hydroxide base to form water plus sodium and benzoate ions. This reaction decreased the amount of acid in solution so more acid can dissolve. (this is a precursor to next semester's work on equilibrium and acid-base chemistry).
36
5.62 M at 20 degrees
40
2.412; not much variation with temperature because mass, unlike volume, does not vary much with temperature.
44
207 mL glycerol
48
64 g KNO3
52
C=1.4 x10^-6 M = [argon]
54
P methanol = 85.8 mmHg
60 2.68 g hemoglobin
68 C6H6N2O
72
a i= 1.1
b i= 1.07
88
10% palmitic acid .00396 mole solute