MODULE 2 - 2.1.5 redox Flashcards
1
Q
What is reduction
A
Gain of electrons
2
Q
What is oxidation
A
Loss of electrons
3
Q
What is the oxidation number of elements?
A
0
4
Q
What is the oxidation number of ions?
A
The same charge as the ion i.e Cl (-1) and Ca (2+)
5
Q
Oxidation number of hydrogen
A
+1 except -1 in hydrides
6
Q
Oxidation number of oxygen
A
-2 except -1 in peroxides and +2 in OF2
7
Q
Reduction
A
Decrease in oxidation number (oxidising agent)
8
Q
Oxidation
A
Increase in oxidation number (reducing agent)
