1. Types of Reactions and Predicting Products SNC2D

2. Types of Reactions Reactions can be divided into 4 main types: Synthesis Synthesis Decomposition Decomposition Single Displacement/Replacement Single Displacement/Replacement Double Displacement/Replacement Double Displacement/Replacement

3. Synthesis Synthesis: 2 or more reactants combine to form 1 product

4. Synthesis

5. Synthesis e.g.Mg + O 2 -> MgO

6. Synthesis Synthesis: 2 or more reactants combine to form 1 product e.g. 2Mg + O 2 -> 2 MgO

7. Synthesis Synthesis: 2 or more reactants combine to form 1 product e.g. 2Mg + O 2  2 MgO S + Zn  ZnS

8. Decomposition Decomposition: 1 reactant breaks down into 2 or more products

9. Decomposition e.g. H 2 O  H 2 + O 2

10. Decomposition Decomposition: 1 reactant breaks down into 2 or more products e.g. 2 H 2 O  2 H 2 + O 2

11. Decomposition Decomposition: 1 reactant breaks down into 2 or more products e.g. 2 H 2 O  2 H 2 + O 2 KClO 3  KCl + O 2 KClO 3  KCl + O 2

12. Decomposition Decomposition: 1 reactant breaks down into 2 or more products e.g. 2 H 2 O  2 H 2 + O 2 2 KClO 3  2 KCl + 3 O 2 2 KClO 3  2 KCl + 3 O 2

13. Single Displacement Single Displacement: a single element replaces another in a compound

14. Single Displacement Single Displacement: a single element replaces another in a compound e.g. MgBr 2 + Cl 2  MgCl 2 + Br 2 Negative ions replace negative ions!

15. Single Displacement Single Displacement: a single element replaces another in a compound e.g. Fe + CuSO 4 

16. Single Displacement Single Displacement: a single element replaces another in a compound e.g. Fe + CuSO 4  Cu + FeSO 4 And positive ions replace positive ions!

17. Double Displacement Double Displacement: parts of two compounds switch places

18. Double Displacement Double Displacement: parts of two compounds switch places e.g. NaOH + FeCl 3 

19. Double Displacement Double Displacement: parts of two compounds switch places e.g. NaOH + FeCl 3  Fe(OH) 3 + NaCl

20. Double Displacement Double Displacement: parts of two compounds switch places e.g. 3 NaOH + FeCl 3  Fe(OH) 3 + 3 NaCl

21. Double Displacement Double Displacement: parts of two compounds switch places e.g. 3 NaOH + FeCl 3  Fe(OH) 3 + 3 NaCl Remember that positive ions pair with negative ions.

22. Combustion And remember that there also exist combustion reactions: e.g. the combustion of hydrocarbons like methane CH 4 + O 2  CO 2 + H 2 O