3.1.7 REDOXS

Indicator of degree of oxidation of an atom in chemical compound

0

Always -1

-2 BUT:
-1 in peroxides eg H202
+2 with Fluorine

-1 BUT:
can be positive with F or O

+1 with non-metal
-1 with metals

+1, +2, +3

The species is simultaneously oxidised and reduced

1)Calculate oxidation states

2)Balance atoms not O or H

3) Sort out Oxygen by adding H20s

4)Sort out hydrogen by adding H+

5)Sort out electrons

1)Multiply half equations so electrons will cancel out
2)Combine and cancel anything that comes in both sides