CHEM - 1411 Chapter 4
TYPES OF CHEMICAL REACTIONS & STOICHIOMETRY
1. Specify how each of the following strong electrolytes ionizes or dissociates into ions when dissolve in
water.
a) KNO3
b) FeSO4
c) (NH4)2CO3
d) NaHCO3
2. Using solubility table, predict whether each of the following compounds is soluble or insoluble in
water:
a) NaCN
b) SrCO3
c) Pb(C2H3O2)2
d) Ag2S
3. Write balanced complete molecular equation, ionic equation, and net ionic equations for the
reactions that occur when each of the following solutions are mixed. Identify the spectator ion or ions
in each reaction:
a) Pb(NO3)2 and Na2S
b) AgNO3 and K2SO4
c) Na2CO3 and HCl
4.
5.
6.
Classify each of the following as strong or weak acid or base:
a) HClO4
b) NaOH
c) NH3 as NH4OH
d) HCN
Which element is oxidized (Reducing agent), and which is reduced (Oxidizing agent) in the
following reactions?
a)
Cl2
+ 2NaBr 
b)
Zn
+
c)
Fe2O3
Cl2
+ 3CO


2NaCl + Br2
Zn Cl2
2Fe
+
3CO2
Determine the oxidation number for the indicated elements in each of the following substances:
b) C in C2O42d) P in H2PO4-
a) Br in HBrO2
c) C in COCl2
7. Using activity series table, what is the outcome of each of the following reactions? If no
reaction occurs, write NR.
a) Ag
b) Zn
c) H2
+
+
+
Pb(NO3)2
AgNO3
CuO



d) Br2
f) Co
8.
+
+
NaF
HCl


Calculate the following quantities:
a) Molarity of a solution that contains 0.0225 mol Na2SO4 in 400 ml solution
b) Moles of HNO3 in 45.0 ml of 2.50 M solution of nitric acid
c) Volume of 2.00 M Ca(OH)2 solution needed to supply 0.250 mol of Ca(OH)2
9.
Indicate the concentration of each ion present in the following solution:
a) 0.25 M BaCl2
b) 0.25 M C2H5OH
c) 0.20 M KCl + 0.25 M K2CO3
10. Calculate the volume of 0.75 M HCl required to neutralized completely 25.0 ml of 0.15 M Ba(OH)2
11. How many grams of the solute is required to prepare a 100.0 ml solution of 0.045 M Na2SO4 ?