1. Reaction Predictions ! !

2. Types of Chemical Reactions  Single Displacement  Double Displacement  Decomposition  Synthesis  Combustion

3. Single Displacement A +BC  AC + B One element shoves the other element out!

4. Example 1: Ca + AlCl 3  CaCl 2 + Al

5. Example 2: AlCl 3 + K 

6. Example 3: Zn + FeCl 2 

7. What do metals have to do with reaction predictions? Metals vary in reactivity Lose electrons in a reaction AND give the electrons to someone else Metal’s ability to give electrons depends on how reactive the metal is How easily/quickly the metal wants to give up its electrons

8. Activity Series of Metals Metals listed and arranged according to reactivity. Metals will displace other metal ions in a solution from any metal BELOW it Generally, Metals > H 2 on activity series will produce hydrogen gas (H 2 ) when combined with an acid Metals < H 2 cannot produce hydrogen gas (H 2 ) from an acid

9. Example 1: Predict the products Mg (s) + Cu +2 (aq)

10. Example 2: Predict the products. Ag (s) + Cu +2 (aq)

11. Example 3: Predict the products. Al (s) + H + (aq)

12. Example 4: Predict the products. Ag (s) + H + (aq)

13. Double Displacement AB + CD  AC + BD Elements switch partners !

14. Example 1: Na 3 PO 4 + BaCl 2  Ba 3 (PO 4 ) 2 + NaCl

15. Example 2: K 3 PO 4 + MgSO 4 

16. Decomposition AB  A + B Breaking chemical compound up, going from BIG to SMALL !

17. Example 1: Au 2 O 3  Au + O 2

18. Example 2: H 2 O 

19. Synthesis A + B  AB Joining! Making new chemical compound !

20. Example 1: Mg + N 2  Mg 3 N 2

21. Example 2: Be + Cl 2 

22. You Pick Two

23. Combustion HYDROCARBON (compound made up of just Cs and Hs) + O 2  CO 2 + H 2 O Chemical reactions involve a compound burning.

24. Example 1: C 2 H 6 + O 2  CO 2 + H 2 O

25. Example 2: Propane (C 3 H 8 ) burns

26. Gandalf combines aluminum metal with sodium hydroxide in solution. What does he produce?]======

27. Practice  Zinc metal combines with hydrochloric acid (HCl).  Sodium sulfide combines with magnesium oxide.  Calcium oxide breaks down.  C 4 H 8 burns