2. Are neutral because the total positive charges of the cation equal the total negative charge of the anion.

3. Cation is written and named first, anion is second.

4. Are neutral because the total positive charges of the cation equal the total negative charge of the anion. Cation is written and named first, anion is second. Because the charges of each are ‘cancelled’ out – the charges are not written.

5. Are neutral because the total positive charges of the cation equal the total negative charge of the anion. Cation is written and named first, anion is second. Because the charges of each are ‘cancelled’ out – the charges are not written. EG. Lead Chloride = Pb2+ and Cl-.

6. Are neutral because the total positive charges of the cation equal the total negative charge of the anion. Cation is written and named first, anion is second. Because the charges of each are ‘cancelled’ out – the charges are not written. EG. Lead Chloride = Pb 2+ and Cl - Therefore lead chloride contains 2 chloride ions for every lead ion – Pb 2+ Cl - Cl - = PbCl 2

7. EG. Sodium Carbonate.

8. Na + + CO 3 2-

9. EG. Sodium Carbonate. _______ + _________ From the charges on each side how many do we need to make it balanced?

10. EG. Sodium Carbonate. From the charges on each side how many do we need to make it balanced? Na + Na + and CO 3 2-

11. EG. Sodium Carbonate. From the charges on each side how many do we need to make it balanced? Na + Na + and CO 3 2- Formula has cation first and anion second =

12. EG. Sodium Carbonate. From the charges on each side how many do we need to make it balanced? Na + Na + and CO 3 2- Formula has cation first and anion second = Na 2 CO 3

13. Aluminium sulfate Lead Nitrate

14. Al 3+ and SO 4 2-

15. We need to make it neutral, so…

16. Al 3+ and SO 4 2- We need to make it neutral, so… Al 3+ Al 3+ and SO 4 2- SO 4 2- SO 4 2-

17. Al 3+ and SO 4 2- We need to make it neutral, so… Al 3+ Al 3+ and SO 4 2- SO 4 2- SO 4 2- Formula is therefore Al 2 (SO 4 ) 3

18. Contains Pb 2+ and NO 3 -

19. We need to make it neutral = two nitrate ions for every lead ion

20. Contains Pb 2+ and NO 3 - We need to make it neutral = two nitrate ions for every lead ion Pb(NO 3 ) 2

21. Name of compound Ions presentBalanceFormula Sodium Chloride Iron(III) Chloride Aluminium Oxide

22. a) copper (II) sulfate b) calcium chloride c) Lead oxide d) Magnesium nitrate e) Iron (II) oxide f) Potassium carbonate g) Aluminium nitrate h) Potassium Chloride