Name: _______________
Types of Chemical Reactions Worksheet
Writing Formulas
In order to complete chemical reactions, you must be able to write formulas for ionic
compounds. Remember, to write the formula for ionic compounds all you have to do is crisscross the numerical value of the charges into subscripts for the elements. Remember, polyatomic
ions must be kept in brackets if there are more than one of them!
Ex) Ca+2
Cl –1 criss-crosses to make the formula CaCl2 (we don’t write 1’s as subscripts)
Ex) Al+3
SO4-2
makes Al2(SO4)3
Write formulas for the following ionic compounds (salts)
1. magnesium fluoride __________
6. iron (II) sulfate
___________
2. calcium nitride
__________
7. barium nitrate
___________
3. aluminum iodide
__________
8. potassium phosphate
___________
4. sodium chloride
__________
9. cobalt (II) chlorate
___________
5. copper (I) sulfide
__________
10. zinc carbonate
___________
Write formulas for the following basic oxides (metal oxides)
1. lithium oxide
__________
6. iron (III) oxide
___________
2. magnesium oxide
__________
7. silver oxide
___________
3. barium oxide
__________
8. nickel (II) oxide
___________
4. potassium oxide
__________
9. tin (IV) oxide
___________
5. cesium oxide
__________
10. copper (II) oxide
___________
Write formulas for the following bases (end in hydroxide)
1. lithium hydroxide
__________
6. lead (II) hydroxide
___________
2. barium hydroxide
__________
7. zinc hydroxide
___________
3. aluminum hydroxide __________
8. calcium hydroxide
___________
4. potassium hydroxide __________
9. copper (I) hydroxide
___________
5. copper (II) hydroxide __________
10. magnesium hydroxide
___________
1
Write formulas for the following acids (start with hydrogen!)
1. sulfuric acid
____________
6. carbonous acid
____________
2. hydrosulfuric acid
____________
7. sulfurous acid
____________
3. carbonic acid
____________
8. nitrous acid
____________
4. nitric acid
____________
9. phosphorous acid ____________
5. hydrofluoric acid
____________
10. hydroiodic acid
____________
Types of Reactions
There are 5 major types of reactions simplified by the following equations:
 Synthesis/Combination
A + B  AB
 Decomposition
AB  A + B
 Combustion
? + O2  ?
 Single Replacement
X + AB  XB + A or
Y + AB  AY + B
 Double Replacement
XY + AB  XB + AY
Classify each of the following reactions:
1. Zn + Cl2  ZnCl2
2. 2 H2S + 3 O2  2 SO2 + 2 H2O
3. Cu + 2 AgNO3  Cu(NO3)2 + 2 Ag
4. Mg(OH)2  MgO + H2O
5. CaCl2
+ Na2SO4  CaSO4 + 2 NaCl
6. CaO + H2O  Ca(OH)2
7. Pb + 4 HCl  PbCl4 + 2 H2
8. Li2O + CO2  LiCO3
9. SO2 + H2O  H2SO3
10. MgCO3  MgO + CO2
Classify each of the following reactions when only the reactants are given and fill
in the products and balance:
1. Mg + N2 
2. C2H6 + O2 
3. Zn + CuCl2 
4. Ca + H2O 
5. AgNO3
+ NaI 
2
6. Fe(NO3)3
+
LiOH 
7. MgCO3 
8. SO2 + H2O 
9. HI 
10. H2SO4
+ LiOH 
Finishing Reactions
TYPE
Complete the following by identifying the type of reaction AND properly writing formulas:
(HINT: double check to make sure the single replacements will work!)
1. Cobalt (III) hydroxide 
2. butane + oxygen 
3. AgNO3 (aq) + Fe2S3 (aq) 
4. lead (II) sulfate 
5. Fe + S8 
(use iron (III) )
6. aluminum chlorate 
7. C6H12 + O2 
8. K2CO3 (aq) + HCl (aq) 
9. ethane burning 
3
TYPE
10. lead (II) + tin(II)nitrate 
11. sulfuric acid 
12. Ca + O2 
13. zinc + sulfuric acid 
14. CO2 + H2O 
15. Cl2 + LiBr 
16. calcium chloride + potassium hydroxide 
17. K2O + H2O 
18. barium hydroxide 
19. Al + Ag2O 
20. MgO + CO2 
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TYPE
21. lithium hydroxide + sulfuric acid 
22. magnesium + nitric acid 
23. Potassium + water 
24. KCl 
25. CuI + F2 
26. Na2SO4 (aq) + Ba(NO3)2 (aq) 
27. H3PO4 (aq) + NaOH (aq) 
28. BeO + H2O 
29. zinc + oxygen 
5