Mole/mass conversions, Percent composition
1.  Read chapter 2 (82-94)
2 . 2.7, 2.9, 2.10, 3.1, 3.2 OWLs due Thursday, September 24

Sept 23 Lecture

NOTE: Table of ions that you need to know is on page 74, Table 2.4.  I showed the table from the older edition of the textbook during lecture

Some interesting comments near the end of lecture regarding the distinction between a physical change and a chemical change.  Although it is correct that moderate inputs of energy often lead to physical changes, the most important criterion is that of bonding.  If the bonding between atoms changes, then it is a chemical change – so heating Co(H2O)6Cl2 to produce CoCl2 absolutely changes the bonding within this chemical compound.