1. Balance Chemical Reactions

2. 3-25-03Kentlake Science Department2 Synthesis Reactions Occur when two or more substances combine to form one compound.

3. 3-25-03Kentlake Science Department3 Problem 1 N 2 + H 2 NH 3 N H 2 2 1 36 2 6 3 2

4. 3-25-03Kentlake Science Department4 Problem 2 S 8 + O 2 SO 3 S O 8 1 2 3 8 8 24 12 24

5. 3-25-03Kentlake Science Department5 Problem 3 N 2 + O 2 N 2 O N O 2 2 2 1 2 4 2 4 2

6. 3-25-03Kentlake Science Department6 Synthesis Reactions K + Cl 2 Sb + S 8 Cu + O 2

7. 3-25-03Kentlake Science Department7 Synthesis Reactions Cs + O 2 Ag + O 2

8. 3-25-03Kentlake Science Department8 Single Displacement Reactions Occur when an uncombined element replaces an element that is part of a compound.

9. 3-25-03Kentlake Science Department9 Problem 4 Na + H 2 O NaOH + H 2 Na H O 11 23 1 1 22 4 4 2 2 2 2 2

10. 3-25-03Kentlake Science Department10 Problem 5 Zn + HCl ZnCl 2 + H 2 Zn H Cl 1 1 1 2 1 2 2 2 2

11. 3-25-03Kentlake Science Department11 Single Displacement Reactions Zn + FeCl 3 + Cs +H 2 SO 4 + Fe 2 O 3 + H 2 +

12. 3-25-03Kentlake Science Department12 Single Displacement Reactions Zn + CuSO 4 + Fe + CuSO 4 +

13. 3-25-03Kentlake Science Department13 Decomposition Reaction A complex substance breaks down into two or more simpler substances. 2H 2 O 2H 2 + O 2 AB A + B

14. 3-25-03Kentlake Science Department14 Problem 6 KClO 3 KCl + O 2 K Cl O 11 1 1 2 2 3 2 2 6 2 2 2 3 6

15. 3-25-03Kentlake Science Department15 Problem 7 HgO Hg + O 2 Hg O 1 1 1 2 2 2 2 2 2

16. 3-25-03Kentlake Science Department16 Decomposition Reactions Al(OH) 3 + H 2 O CuSO 4 + SO 3 AuCl 3 Au +

17. 3-25-03Kentlake Science Department17 Decomposition Reactions H 2 SiO 3 + H 2 O HNO 3 + H 2 O

18. 3-25-03Kentlake Science Department18 Combustion Reactions A hydrocarbon is a compound containing only carbon and hydrogen. When burned they will combine with oxygen.

19. 3-25-03Kentlake Science Department19 Problem 10 C 7 H 6 O 2 + O 2 CO 2 + H 2 O C H O 7 1 6 2 43 7 7 15 3 6 14 2 12 6 14 6 12 3417 15 34

20. 3-25-03Kentlake Science Department20 Combustion Reactions CH 4 + O 2 CO 2 + H 2 O C 2 H 6 + O 2 CO 2 + H 2 O C 6 H 12 O 6 + O 2 CO 2 + H 2 O C 2 H 5 OH + O 2 CO 2 + H 2 O

21. 3-25-03Kentlake Science Department21 Double Displacement Reactions An element from each of two compounds switch places.

22. 3-25-03Kentlake Science Department22 Problem 8 BaCl 2 +Al 2 (SO 4 ) 3 BaSO 4 + AlCl 3

23. 3-25-03Kentlake Science Department23 Problem 9 FeBr 2 + K 2 CO 3 FeCO 3 + KBr Note that the subscripts of K and Br have changed in the formulas.

24. 3-25-03Kentlake Science Department24 Problem 9 FeBr 2 + K 2 CO 3 FeCO 3 + KBr Fe Br K CO 3 1 1 2 1 1 2 11 2 2 2

25. 3-25-03Kentlake Science Department25 Double Displacement Reactions FeS + HCl NaOH + Al 2 (SO 3 ) 3 NaCl + H 2 SO 4

26. 3-25-03Kentlake Science Department26 Double Displacement Reactions H 2 S + CuSO 4 KCl + Hg 2 SO 4

27. 3-25-03Kentlake Science Department27 Neutralization Reactions Double displacement reactions that involve the reaction between an acid and base

28. 3-25-03Kentlake Science Department28 Neutralization Reactions Mg(OH) 2 +2HCl MgCl 2 +2H 2 O base + Acid salt + water

29. 3-25-03Kentlake Science Department29 Internet References Group work site Balancing Equations Tutorial in Reactions