1. Use a Roman numeral to indicate the oxidation number of an element in a compound
2. Define redox reactions as involving simultaneous oxidation and reduction
3. Define oxidation as gain of oxygen and reduction as loss of oxygen
4. Identify redox reactions as reactions involving gain and loss of oxygen
5. Identify oxidation and reduction in redox reactions
6. Define oxidation in terms of:
7. (a) loss of electrons
8. (b) an increase in oxidation number
9. Define reduction in terms of:
10. (a) gain of electrons
11. (b) a decrease in oxidation number
12. Identify redox reactions as reactions involving gain and loss of electrons
13. Identify redox reactions by changes in oxidation number using:
14. (a) the oxidation number of elements in their uncombined state is zero
15. (b) the oxidation number of a monatomic ion is the same as the charge on the ion
16. (c) the sum of the oxidation numbers in a compound is zero
17. (d) the sum of the oxidation numbers in an ion is equal to the charge on the ion
18. Identify redox reactions by the colour changes involved when using acidified aqueous potassium manganate(VII) or aqueous potassium iodide
19. Define an oxidising agent as a substance that oxidises another substance and is itself reduced
20. Define a reducing agent as a substance that reduces another substance and is itself oxidised
21. Identify oxidising agents and reducing agents in redox reactions