Naming Ions and Ionic Compounds

• What do you think an “oxyanion” would be?

Answer: a polyatomic ion composed of an element bonded to one or more oxygen atoms

Naming Ions and Ionic Compounds (continued)

• Oxyanions are named according to the relative number of oxygen atoms:1. -ate = more O atoms (ClO3

-1, SO4-2, NO3

-1)

2. -ite = fewer O atoms (ClO2-1, SO3

-2, NO2-1)

• Halogen oxyanions follow the naming pattern established by chlorine:1. ClO4

-1 = perchlorate 3. ClO2-1 = chlorite

2. ClO3-1 = chlorate 4. ClO-1 = hypochlorite

• So what is the name of IO4-1? BrO3

-1?

Naming Ions and Ionic Compounds (continued)

• Refer to Table 8-8, p.227, and the LEFT side of your Naming Compounds Flowchart

• Cation (metal) + anion (nonmetal)

• Transition metals have many different oxidation numbers, so you have to specify the oxidation number with a Roman numeral. (EX: FeO = iron (II) oxide; Fe2O3 = iron (III) oxide)

Assignments • Practice Problems: p.226 (29-33)

• Study Guide for Content Mastery workbook (pp.46-47: ALL)

• Also, pp.44-45: 7-9, 19-23

• NOTE: Directions at the top of p.47 should refer you to Table 8.6 (p.224), NOT 8.7.