1. WRITING EQUATIONS REVIEW

2. In a combustion reaction, one of the reactants is always
Oxygen Gas (O2)

3. In a combustion reaction, one of the products is always
Water (H2O)

4. In every balanced chemical equation, each side of the equation has the same number of _______ of each element.
ATOMS

5. H2O(l)  O2(g) H2(g)
 __
Decomposition

6. Mg(s) N2(g)  Mg3N2(s)
__  __
Synthesis

7. Fe(s) Cl2(g)  FeCl3(s)
 2
Synthesis

8. Al(s) O2(g)  Al2O3(s) 
Synthesis

9. CaCO3(s)  CaO(s) + CO2(g)
ALREADY BALANCED!
Decomposition

10. NaCl(l)  Na(s) Cl2(g)
 __
Decomposition

11. 3 + 2  __ + 6 Double Replacement FeCl2(aq) + Na3PO4(s) 
Fe3(PO4)2(s) NaCl(aq)
 __
Double Replacement

12. K (s) Cl2(g)  KCl(s)
__  2
Synthesis

13. HCl(aq) + Ca(OH)2(s)  CaCl2(aq) + H2O(l)
__  __
Double Replacement

14. KClO3(s)  KCl (s) O2(g) 
Decomposition

15. AgNO3(aq) + AlCl3(aq)  AgCl(s) + Al(NO3)3(aq)
__  __
Double Replacement

16. Na(s) H2O(l)
 NaOH(aq) H2(g)
 __
Single Replacement

17. Fe(s) + CuSO4(aq)  FeSO4(aq) + Cu(s)
ALREADY BALANCED!
Single Replacement

18. LiCN(aq) + BaCl2(aq)  LiCl(aq) + Ba(CN)2(s)
__  __
Double Replacement

19. NaBr(aq) + Cl2(aq)  NaCl(aq) + Br2(l)
__  __
Single Replacement

20. C2H5OH(g) + O2(g)  CO2(g) + H2O(g)
__ 
Combustion

21. Sb2S3(s) + Fe(s)  Sb(s) + FeS(s)
__ 
Single Replacement

22. C2H6(g) + O2(g)  CO2(g) + H2O(g)
Combustion

23. C2H2(g) + O2(g)  CO2(g) + H2O(g)
Combustion

24. CH4(g) + O2(g)  CO2(g) + H2O(g)
__  __
Combustion

25. F2 Cl2 Br2 I2 H2 N2 O2
The combustion of propane (C3H8). This is a reaction of propane with oxygen that yields carbon dioxide and water.
C3H O2  CO H2O
__ 
COMBUSTION

26. F2 Cl2 Br2 I2 H2 N2 O2
The reaction of aluminum bromide with magnesium hydroxide to form aluminum hydroxide and magnesium bromide.
Figure out your compounds first.
Al Br –
AlBr3
Mg OH -
Mg(OH)2

27. F2 Cl2 Br2 I2 H2 N2 O2
The reaction of aluminum bromide with magnesium hydroxide to form aluminum hydroxide and magnesium bromide.
Al OH –
Al(OH)3
Mg Br –
MgBr2

28. F2 Cl2 Br2 I2 H2 N2 O2
The reaction of aluminum bromide with magnesium hydroxide to form aluminum hydroxide and magnesium bromide.
AlBr Mg(OH)2  Al(OH) MgBr2 
DOUBLE REPLACEMENT

29. F2 Cl2 Br2 I2 H2 N2 O2
Potassium metal and chlorine gas combine to form potassium chloride.
Figure out your compounds first.
K Cl-
KCl

30. F2 Cl2 Br2 I2 H2 N2 O2
Potassium metal and chlorine gas combine to form potassium chloride.
K Cl  KCl
__ 
SYNTHESIS

31. F2 Cl2 Br2 I2 H2 N2 O2
Hydrogen gas and nitrogen monoxide react to form water and nitrogen gas.
H NO  H2O N2
 __
SINGLE REPLACEMENT

32. F2 Cl2 Br2 I2 H2 N2 O2
The decomposition of hydrogen peroxide (H2O2) to form water and oxygen.
H2O  H2O O2
 __
Decomposition

33. The reaction Fe(s) + O2(g)  Fe2O3(s) is an example of a:

34. Mg(s) + HCl(aq)  MgCl2(aq) + H2(g)
The above reaction is a __________________________ reaction.

35. In what type of reaction is water often a product?

36. The reaction 2Fe + 3Cl  2FeCl is which type of reaction?
The equation 2HgO  2Hg + O2 is an example of which type of reaction?

37. Balance the skeleton equation.
AlCl NaOH  Al(OH) NaCl
Balance Fe Cl  FeCl

38. Do the following statements happen in all chemical reactions
Do the following statements happen in all chemical reactions? (Yes or No)
The bonds of the reactants are broken and new bonds of the products are formed. _______
The ways in which atoms are joined together are changed. _______
New atoms are formed as products. _______
The starting substances are called reactants. _______

39. In every balanced chemical equation, each side of the equation has the same number of _________________ of each element.

40. In a combustion reaction, one of the reactants is always
________________________________
The products of a combustion reaction may include
w______________, c___________ d_____________, and
c_________________ m__________________