Redox Flashcards
1
Q
ON of uncombined elements
A
0
2
Q
ON of hydrogen
A
1 (apart from H- ion)
3
Q
ON of simple ion
A
equal to charge on ion
4
Q
ON of group 1 metals
A
+1
5
Q
ON of group 2 metals
A
+2
6
Q
Sum of ON in neutral molecules
A
0
7
Q
ON of compound ions
A
equal to the charge on ion
8
Q
ON of fluorine
A
-1: always true, as most electronegative
9
Q
ON of oxygen
A
-2 (except peroxides: -1 or when bonded to fluorine)
10
Q
Oxidation
A
- loss of electrons
- increase in oxidation number
11
Q
Reduction
A
- gain of electrons
- decrease in oxidation number
12
Q
Metals forming ions
A
- form positive ions
- lose electrons
- increase in oxidation number
- oxidised
13
Q
Non-metals reacting
A
- form negative ions
- gain electrons
- decrease in oxidation number
- reduced
14
Q
Oxidising agent
A
- causes another species to be oxidised
- is reduced
15
Q
Reducing agent
A
- causes another species to be reduced
- is oxidised
