Oxidation + Reduction Flashcards
1
Q
What is oxidation?
A
- Element has lost electrons- Oxidation number increases
2
Q
What is reduction?
A
- Element has gained electrons- Oxidation number decreases
3
Q
What is the rule for the oxidation states of elements?
A
The oxidation state of an uncombined element is 0 and elemental ions have oxidation states equal to their charge
4
Q
What is the rule for the oxidation states of compounds?
A
Overall oxidation state of a compound is 0 unless it is a molecular ion, in which case the oxidation state is equal to the charge
5
Q
What is disproportionation?
A
When an element is simultaneously oxidised and reduced
