1) Problem 5.4 in your textbook. (10 points)
2) Problem 5.10 in your textbook (10 points)
3) Problem 5.12 in your textbook (10 points)
4) Problem 5.17 in your textbook. Hint: use Born-Haber cycles (10 points)
5) Problem 5.16 (10 points)
6) a) For CsCl calculate the Madelung constant A in the same fashion
as in the solved example in your textbook for NaCl. What is the value after
the inclusion of two, three, four, and five terms? b) Compare the values
with the ones given in the table, and compare with NaCl c) Show your understanding
of the Madelung constant by calculating A for the isolated F-Be2+F-
fragment, considered as a purely ionic species. (30 points)
7) By using: a) the number of NaCl formula units in the unit cell of
NaCl as calculated in your book (and during class) b) The density of NaCl
known to be 2.167 g.cm-3 c) Your knowledge of the relationships
between density, volume, Avogadro’s number and formula weight find: 1)
The volume of the unit cell, and thus the length of the edge of the cell
2) The length of the internuclear distance r+
+ r- 3) Check your answer against literature values from
tables in your textbook (or the other textbooks in reserve) (20 points).