3.1.7 Redox Flashcards
(10 cards)
1
Q
what is oxidation?
A
the process of electron loss
2
Q
what is reduction?
A
the process of electron gain
3
Q
what do all uncommitted elements have an oxidation number of?
A
0
4
Q
what do the oxidation numbers of the elements in a compound add up to?
A
0
5
Q
what’s the oxidation number of a monoatomic ion equal to?
A
the ionic charge
6
Q
rule about where to put electrons when doing half equations?
A
if positive reactants put electrons on left
if negative reactants put electrons on right
7
Q
what is an oxidising agent?
A
electron acceptor, causes another element to oxidise
-reduced itself
8
Q
what is a reducing agent?
A
electron donor, causes another element to reduce
-oxidised itself
9
Q
how to balance half equations?
A
- balance by adding electrons
- add H₂O to balance O’s
- add H⁺ in reactants to balance H’s
- check to see that the sum of the charges is the same on both sides
10
Q
how to combine half-equations?
A
- make electrons the same (multiply)
- combine them and cancel electrons
