Ch. 5 Oxidation and Reduction. Milbank High School . Ch. 5 Objectives. Define some important properties of oxygen List important properties of hydrogen Describe oxidation and reduction Identify an oxidation/reduction reaction Identify some common oxidizing and reducing agents
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Milbank High School
1. The total of the oxidation numbers of all the atoms in a neutral molecule, an isolated atom, or a formula unit is 0
2. In their compounds, the Group 1A metals all have an oxidation number of +1, and the Group 2A metals have an oxidation number of 2+.
3. In its compounds, hydrogen has an oxidation number of +1 (except in metal hydrides such as NaH, where it is -1)
4. In its compounds, oxygen has an oxidation number of -2 (except in peroxides such as H2O2, where it is -1)
5. In their binary compounds with metals, Group7A elements have an oxidation number of -1. Group 6A elements have an oxidation number of -2, and Groups 5A elements have an oxidation number of -3.
0 +3 -2 0 +3 -2
Reduction: CuO is the oxidizing agent
Oxidation: H2 is the reducing agent