Redox Reactions Flashcards
1
Q
What does redox mean?
A
Reduction and oxidation.
2
Q
What can oxidation be?
A
- Gain of oxygen.
- Loss of hydrogen.
- Loss of electrons.
- Oxidation numbers increase.
3
Q
What can reduction be?
A
- Loss of oxygen.
- Gain of hydrogen.
- Gain of electrons.
- Oxidation numbers decrease.
4
Q
What is the reducing agent?
A
The substance which is oxidised.
5
Q
What is the oxidising agent?
A
The substance which is reduced.
6
Q
What is the oxidation number of an uncombined element?
A
0
7
Q
What is the oxidation number of combined oxygen in compounds?
A
-2
8
Q
What is the oxidation number of combined hydrogen in compounds?
A
-1
9
Q
What is the oxidation number of a simple ion?
A
Charge on ion.
10
Q
What is the oxidation number of combined fluorine in compounds?
A
-1
11
Q
What element takes precedence over any other with oxidation numbers?
A
Fluorine.
12
Q
What is the oxidation number of oxygen in peroxides (e.g. H2O2)?
A
-1
13
Q
What is the oxidation number of hydrogen in metal hydrides?
A
-1
