Chemistry Review
1. Identify the ionic compound that will be made from each of the following pairs of elements. For
each compound, write out the correct chemical formula and name.
Elements involved
Chemical formula
Name
NaF
K2O
BeCl2
Sodium fluoride
Potassium oxide
Beryllium chloride
sodium and fluorine
potassium and oxygen
beryllium and chlorine
2. Write the correct chemical formula for the following:
Chemical formula
NaI
sodium iodide
BeF2
beryllium fluoride
Chemical name
Chemical formula
barium bromide
BaBr2
copper (II) bromide
CuBr2
3. Name the following compounds.
Compound
Name
Compound
Name
KCl
Potassium chloride
PbI4
Lead (IV) iodide
Na3P
Sodium phosphide
SnO
Tin (II) oxide
Fe2S3
Iron (III) sulfide
PbBr2
Lead (II) bromide
4. Write out the chemical formula for each of the following:
Name
Formula
Name
Formula
Magnesium hydroxide
Mg(OH)2
Ammonium nitrate
NH4NO3
Copper (II) sulfate
CuSO4
Sodium carbonate
Na2CO3
Calcium sulfate
CaSO4
Potassium chlorate
KClO3
5. Name the following compounds:
Compound
Name
K2CO3
Potassium carbonate
Na2SO4
Sodium sulfate
Al(HCO3)3
Aluminum bicarbonate
Compound
CuSO4
Mg(OH)2
PbCO3
Name
Copper (II) sulfate
Magnesium hydroxide
Lead (II) carbonate
6. Name the following molecular compounds:
Compound
Name
Compound
Name
NO
Nitrogen monoxide
CF4
Carbon tetrafluoride
N2O3
Dinitrogen trioxide
SCl2
Sulfur dichloride
7. Write the chemical formula for the following compounds:
Name
Formula
Name
Formula
carbon monoxide
CO
carbon tetrabromide
CBr4
sulfur trioxide
SO3
dihydrogen dioxide
H2O2
phosphorus pentachloride
PCl5
disulfur decafluoride
S2F10
8. For the following write a word equation and then convert to a balanced chemical equation.
a) Aqueous solutions of barium sulfate and sodium hydroxide react to form sodium sulfate in
solution and solid barium hydroxide.
Word eq’n: barium sulfate + sodium hydroxide  sodium sulfate + barium hydroxide
Chem eq’n:
BaSO4 (aq) + 2 NaOH (aq)  Na2SO4 (aq) + Ba(OH)2 (s)
b) Photosynthesis is the process in which plants use energy from the sun to convert water and
carbon dioxide gas into oxygen gas and glucose – C6H12O6 (aq).
Word eq’n: Energy + water + carbon dioxide  oxygen + glucose
Chem eq’n: Energy + 6 H2O (l) + 6 CO2 (g)  6 O2 (g) + C6H12O6 (aq)
c) An aqueous solution of calcium chloride reacts with fluorine gas to form an aqueous solution of
calcium fluoride and chlorine gas.
Word eq’n: calcium chloride + fluorine  calcium fluoride + chlorine
Chem eq’n:
CaCl2 (aq) + F2 (g) 
CaF2 (aq) +
Cl2 (g)
9. Determine whether the following is a synthesis (S) or decomposition (D) reaction. Provide a
balanced chemical equation for each:
a)
Cr (s) + 3/2 F2 (g)  CrF3 (s) (S)
e)
CaCO3 (s) 
b)
2 AgCl (s)  2 Ag (s) + Cl2 (g) (D)
f)
CaO (s) + H2O (l)  Ca(OH)2 (aq) (S)
c)
2 CsCl(s)  2 Cs (s) +
g) 3 Mg (s) +
Cl2 (g) (D)
d) NaClO3 (s)  NaCl (s) + 3/2 O2 (g) (D)
h)
CaO (s) + CO2 (g) (D)
N2 (g) 
Mg3N2 (s) (S)
H2O (l)  H2 (g) + ½ O2 (g) (D)
10. Predict the product of the following synthesis reactions. (All products formed below are solids.)
a) 3 Ca (s) + N2 (g)  Ca3N2 (s)
c) 12 Cs (s) + P4 (s)  4 Cs3P (s)
b) 2 K (s) + ½ O2 (g)  K2O (s)
d) Al (s) + 3/2 F2 (g)  AlF3 (s)
11. Predict the product of the following decomposition reactions. (All metal products are solids, and
any remaining products are gases)
a) AuCl3 (s)  Au (s) + 3/2 Cl2 (g)
c) 2 Li2O (s)  4 Li (s) + O2 (g)
b) MgF2 (s)  Mg (s) + F2 (g)
d) 2 CsCl (s)  2 Cs (s) + Cl2 (g)