Physical 1 Section 1 - Unit 7: Redox Flashcards
1
Q
Explain what is meant by oxidation in reference to oxygen, hydrogen and electrons (3)
A
- Loss of electrons
- Gain of oxygen
- Loss of hydrogen
2
Q
Explain what is meant by reduction in reference to oxygen, hydrogen and electrons (3)
A
- Gain of electrons
- Loss of oxygen
- Gain of hydrogen
3
Q
In terms of electrons, state the meaning of the term reducing agent (1 mark)
A
- Something that loses electrons
OR - Causes another species to gain electrons
4
Q
In terms of electrons, state the meaning of the term oxidising agent (1 mark)
A
- Something that gains electrons
OR - Causes another species to lose electrons
5
Q
Define oxidation state (1)
A
- A number which represents the number of electrons lost or gained by an atom of that element in a compound
6
Q
Oxidation of an element in group 1 (1)
A
+1
7
Q
Oxidation of an element in group 2 (1)
A
+2
8
Q
Oxidation of aluminium (1)
A
+3
9
Q
Oxidation of hydrogen (1)
A
+1
10
Q
Oxidation of hydrogen in metal hydrides (1)
A
-1
11
Q
Oxidation of fluorine (1)
A
-1
12
Q
Oxidation of Cl, Br or I (1)
A
-1
13
Q
Oxidation of oxygen (1)
A
-2
14
Q
Oxidation of oxygen in peroxides/fluorine compounds (1)
A
-1
