Balancing Practice Quiz
Name_________________________
Period________Date_____________
Complete each of the following with the word or words which best finishes the sentence.
1. A chemical equation will show ____________________on the left side and ___________________
on the right side. A(n) _________________ is written between the two sides.
2. A(n) ________ will be written next to any substances in the equation which are gases.
3. _________________________ are placed BEFORE formulas to balance the equation.
4. _________________________ are placed IN the formula and indicate the number of atoms of a
particular element in a molecule.
5. Aqueous or “(aq)” means ____________________________________________________________.
6. A(n) ________ will be written next to any substances in the equation which are solids or precipitates.
Balance the following by placing numbers in the appropriate blanks. Some spaces may be left blank.
______O2

______Fe3O4
______AgNO3 +
______H2S

______Ag2S
+
______HNO3
______Al(NO3)3 +
______K2CO3 
______Al2(CO3)3
+
______KNO3
______Ir2O3
7.
______Fe
8.
9.
+
10. ______IrCl3
+
______NaOH 
11. ______NH3
+
______O2

______N2O4
+ ______HCl
+
+ ______NaCl
______H2O
Challenging:
+
______H3PO4

12.
______Mg(OH)2
______Mg3(PO4)2
+
______H2O
13.
______MoO3 + _____Zn + _____H2SO4  _____Mo2O3 + _____ZnSO4 + _____H2O
Writing & Balancing Word Equations
Use the Ion List and Periodic Table to correctly write the formulas and then balance the following word equations.
1.
sodium chlorate (cr)

sodium chloride (cr)

2. silver (s)
+
sulfur (cr)
3. iron (s)
+
copper (II) nitrate (aq)
+
oxygen (g)
silver sulfide (cr)

iron (III) nitrate (aq)
+
copper (s)
4. barium hypochlorite (aq) + potassium sulfate (aq)  potassium hypochlorite (aq) + barium sulfate (s)
5. Hexane, C6H14, burns in a combustion reaction in oxygen to form carbon dioxide and water.