McMurry, pp 29 - 31:
Problems 1.27, 30, 31, 32, 38, 39, 41, 43, 45, 47, 49, 50, 55, 56
1. Write good Lewis structures for the compounds listed below. The structures
are written in the standard abbreviated forms, which give some indication
about the order in which atoms are bonded.
Indicate the hybridization of each atom and describe the expected
geometry. If there are additional reasonable resonance forms, show them
and indicate whether they contribute equally, or if not, which is the preferred
resonance form.
a) CH3OOH
b) HCOO-
c) HCNO
d) CH3CNH+
e) CH2OH+
2. Given that Kw = [H+] [OH-] = 10E-14 , explain why the pKa of H2O is cited as 15.7 and the pKa of H3O+ as -1.7 .
3. The pKa of CH3OH2+ (protonated methanol) is -2.2. Predict the preferred direction of an equilibrium acid-base reaction between H3O+ and CH3OH.