1.7 Oxidation, reduction and redox Flashcards
1
Q
What is oxidation (in terms of electrons)
A
The loss of electrons
2
Q
What is reduction (in terms of electrons)
A
Gaining electrons
3
Q
What is the oxidation state of an element
A
0
4
Q
What do the oxidation states in a neutral compound add up to
A
0
5
Q
What do the oxidation states in a charged compound add up to
A
The total charge (e.g. if the charge was -2, the oxidation states would add up to -2).
6
Q
What is the oxidation state of Hydrogen
A
+1
7
Q
What is the oxidation state of oxygen
A
-2
8
Q
What is the oxidation state of a halide ion
A
-1
9
Q
What is the oxidation state of a group 1 ion
A
+1
10
Q
What is an oxidising agent
A
- Accepts electrons from the species being oxidised
- It gains electrons, so is reduced
- Seen as a reduction in the oxidation number (gets more negative)
11
Q
What is a reducing agent
A
- Donates electrons to the species being reduced
- Loses electrons, so is oxidised
- Seen as an increase in the oxidation number (gets more positive)
