Announcements

1
Announcements

• To join clicker to class today
• Turn on the Clicker (the red LED comes on).
• Push Join button followed by 20 followed by
  the Send button (switches to flashing green LED
  if successful).

• Exam 4 scores available on D2L.
• Bring possible errors to Dr. Gutow's attention as
  soon as possible.

• Wear appropriate clothes to Lab!

2
Review

• attractive interactions among molecules
• ion-ion (lattice energy Uk(Q1Q2/d), calculation
  of U from a cycle of reactions)
• ion-dipole
• dipole-dipole
• dipole - induced dipole
• Dispersion

3
Effect of H-bonding
Figure showning that H-bonded molecules
have unusually high boiling points.
McMurry Fay, Chemistry, Table 10.4
4
Solvation of Ions
fig 9.5