1. Oxidation and Reduction Reactions
Crash Course RedOx Rxns minutes
RedOx Rxn
Silver and sulfur 0:45

2. Oxidation and Reduction Reactions
- a substance Loses one or more electrons
Reduction
- a substance Gains one or more electrons

3. Oxidation and Reduction Reactions
LEO
says
GER

4. Oxidation and Reduction Reactions
Summary
Oxidation and Reduction Reactions
OIL
RIG
Mnemonic (memory aid)
OIL-RIG
Loss of electrons = Oxidation
Gain of electrons = Reduction

5. Oxidizing Agent
a substance that allows another substance to be oxidized, by giving up oxygen or by taking on electrons from the other substance.
Note - the oxidizing agent gets reduced.  
Reducing Agent
a substance that allows another substance to be reduced, by taking on oxygen or by giving up electrons to the other substance.
Note - the reducing agent gets oxidized.  

6. Oxidation and Reduction Reactions
Oxidation Number
– not charges, but a way to keep track of the number of electrons that can be lost or gained #
Oxidation Number Rules :17

7. Oxidation Number Rules
The oxidation number of an atom of an uncombined element is zero.
The oxidation number of any monoatomic ion equals its ionic charge.

8. Oxidation Number Rules

9. Oxidation Number Rules
In compounds, the oxidation number of many elements corresponds to the element's position in the periodic table:
a) Metals in Group 1 are always +1.
b) Metals in Group 2 are always +2.
c) Aluminum is always +3.
d) Fluorine is always -1.

10. Oxidation Number Rules
e) Hydrogen has an oxidation number of +1 when combined with nonmetals
and -1 when combined with a metal in a metal hydride.

11. Oxidation Number Rules
f) Oxygen usually has an oxidation number of -2,
except in peroxides where it is -1,
or in a compound with a more electronegative
element (F) where it is +2.

12. Oxidation Number Rules
The oxidation numbers of elements in compounds are written per atom.

13. Oxidation Number Rules
The algebraic sum of the individual oxidation numbers of all the atoms in the formula for a compound is zero.

14. Oxidation Number Rules
The algebraic sum of the formula for a polyatomic ion (Table E) is equal to the charge of the ion.