3 - Redox Flashcards
1
Q
What is oxidation?
A
loss of electrons
- gain of oxygen
- loss of hydrogen
2
Q
what is reduction?
A
gain of electrons
- loss of oxygen
- gain of hydrogen
3
Q
what is a disproportionation reaction?
A
When an element in a single species is both oxidised and reduced in the same reaction.
4
Q
What is an oxidising agent?
A
- causes other substances to be oxidised.
- it is reduced itself.
5
Q
what is a reducing agent?
A
- causes other substances to be reduced.
- it is oxidised itself.
6
Q
What causes an element in a compound to have a negative oxidation number?
A
being more electronegative.
7
Q
How to name a compound using oxidation numbers?
A
Provide the oxidation number of the unknown element e.g. sulfur(VI) oxide for SO3
8
Q
How to form an equation using oxidation numbers
A
- form an ionic half equation for the element that changes oxidation, ignoring other elements
- balance the charge of the reactants using H+ for acid and OH- for base
- add water to the products
