Redox Flashcards
1
Q
Oxidation
A
- loss of electrons
- gain of oxygen
- loss of hydrogen
2
Q
Reduction
A
- gain of electrons
- loss of oxygen
- gain of hydrogen
3
Q
Usual oxidation number of oxygen
A
-2
4
Q
Usual oxidation number of hydrogen
A
+1
5
Q
Oxidising agent
A
- causes other things to be oxidised
- is reduced (gains electrons) in the reaction
6
Q
Reducing agent
A
- causes other things to be reduced
- is oxidised (loses electrons) in the reaction
7
Q
Disproportionation reaction
A
Reaction where an element from a species is both oxidised and reduced
8
Q
What causes an element in a compound to have a negative oxidation number?
A
Being more electronegative
9
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
10
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
