LR -- Chem 106 -- First Unit


Homework (Zumdahl)
Please review:  molecular shapes and polarity:  Zumdahl Chapt. 8, sections 3, 6, 10, 13.  Try problems 8.81, 8.85, 8.93 from the text.  For more review, look especially at questions in sections 8.10 and 8.13 from OWL.
For a web-based tutorial on molecular structures, try the VSEPR Help Page from Purdue.  (Scroll down in the left frame to get the 11 practice problems.)  You will need to install Chime on your computer for the full effect; it's free, but you need to register before being allowed to download. Chime only works with Internet Explorer.

A complete table of the types of shapes that you may encounter, organized by number of groups of electrons, and then by number of lone pair electrons can be found at the same site as above, at this page. The images in the right column are interactive, if you have Chime installed.

Jan. 9
(the dates are linked to lecture roadmaps)
Intermolecular forces
Chpt. 10
 (don't worry about
pp. 447, 455-6)
Eoc1:  10.33, 10.35, 10.39
10.37, 10.131


Here is a not-bad animation of what happens when water forms hydrogen bonds.
Jan. 11  The solid state Here is a list of interactive solid structures that we looked at in class.
10.1.3, 10.7.4,
Eoc2:  10.79, 10.121
10.80 (In some cases, you need specific information from the text), 10.72 (Let M be the blue, and A the yellow), 10.67
Like to look at solid structures?  The Naval Research Laboratory Center for Computational Materials Science has a good page of various common and not-so-common naturally occurring solids on their Crystal Lattice Structures page, with links to interactive visualizations.  (For control of these visualizations:  L-click and drag to turn structure; R-click for display options.)

Our discussion of solids is too brief to say much about all the reasons for studying them.  New solid materials that have a range of fascinating and useful properties is a very active field of research and invention.   Design of solids with specific properties is often called "nanotechnology."  The University of Wisconsin's Nanoscale Science and Technology Demonstrations page can give you an idea of some of these interesting properties.

Jan. 13 Lattice calculations   10.4a,b,c, 10.4.1, 10.7b
Eoc3: 10.50, 10.54, 10.68;
[Eoc3a:  10.49]
10.51, 10.53, 10.55, 10.83, {optional:  10.75, 10.134 (ans:  8)}
                                    Homework due, 1/18
               Quiz on this material, 1/18
Jan. 18  Phase changes        10.8d,e,f,p,s,
Eoc4:  10.96
10.95, 10.97  (You may want to review p. 244 - 246 for calculations relating change in temperature to heat.)
Jan. 20  Phase diagrams  
10.8k,m, 10.9a,b; Eoc5:  10.90, 10.88,10.102
10.87 (The data should be plotted in such a way as to make a straight-line graph. Appropriate answers to these questions include a graph and a calculation of ΔH. Use of a spreadsheet (such as Excel) is encouraged; if you graph by hand, you must use real graph paper.)10.91, 10.101, 10.103, 10.104
 Here is a site that graphically demonstrates on a large scale one of the hazards of not understanding changes of states of matter.
You can try the melting visualization I showed in class yourself, and also the boiling one.
Phase transitions at the critical point are fun to watch:  here are samples for chlorine and carbon dioxide (with narration). 
Jan. 23 Solutions; 
concentrations and solubility
Chpt. 11
 (omit section 8)
11.1b,c,e, 11.2b,e,11.3.1, 11.3.2, Eoc6:  11.33, 11.35, 11.44, 11.50 11.11, 11.113, 11.29, 11.43, 11.45, 11.49
Y                                  Homework due, 1/25, also problem 10.87 collected
                Quiz on this material,1/25
Jan. 25 Colligative properties   11.4a, 11.4.3*, 11.5a, Eoc7: 11.51, 11.53,11.61; [Eoc7a:  11.55]
*Help on 11.4.3
{optional:  11.106}

Colligative properties,
11.5b,e, 11.6a, 11.7a,b,
Eoc8: 11.67, 11.81, 11.89; [Eoc8a: 11.65]
11.77, 11.88, {optional:  1.120, 11.113}
                    (Electronic homework due,1/30)
Jan. 30 First Hour Exam!