SCH 3UI
Review: Stoichiometry of Reactions in Solution Worksheet
1. How many moles of sodium hydroxide are contained in each of the following?
a) 1.00L of 0.0100 M
b) 250 mL of 0.0100 M
c) 25.15 mL of 0.0100 M
d) 25.15 mL of 0.0134 M
Double Displacement Reaction:
2. Which of the following compounds are insoluble AgI, Na2SO4, KNO3, NaOH, CH3COOH?
3. Write the ionic equation, net ionic equation and identify the spectator ions in the following reactions:
a) KCl
(aq)
+ Pb(NO3)2
b) HCl
(aq)
+ Na2S
4. When Pb(NO3)2
 PbCl2
(s)
+ KNO3
(aq)
(unbalanced)
c) KOH
 H2S + NaCl (unbalanced, missing states)
(aq)
(aq)
(aq)
and KI
(aq)
(aq)
+ HNO3
d) Pb(NO3)2
(aq)
(aq)

+ Na2SO4
(aq)

solutions are mixed, what is the precipitate and which species are spectator ions?
Dilutions:
5. You have a job in the General Chemistry Pre Laboratory. Your first task is to prepare five 1000 mL volumetric
flasks, each containing 1.000 L of 0.100 M HCl. You will do this by adding a measured volume of concentrated
HCl, which is 11.6 M and making up the rest of the volume by filling the flasks with water up to the mark. The
volume of concentrated acid you will add to each flask is?
6. An experiment calls for 200 mL of 2.0 M HCl. If you had a 9.0 M stock solution of HCl on hand, how many mL of
this solution would be required?
7. A 25.0 mL sample of HCl
(aq)
is diluted to a volume of 500 mL. If the concentration of the diluted solution is
0.085 M, what was the concentration of the original solution?
Stoichiometry in Solution Chemistry:
8. Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs, and to
ignite solid-fuel rocket motors. The reaction is: Fe2O3
(s)
+ 2Al
(s)
 2Fe
(l)
+ Al2O3
(s)
What masses of
iron(III) oxide and aluminum must be used to produce 15.0 g of iron?
9. Calculate the mass of precipitate formed when 45.00 mL of 0.200 M NaOH and 22.50 mL of 0.150 M Cr(NO 3)3
are mixed. Cr(NO3)3
(aq)
+ 3NaOH
(aq)
 Cr(OH)3
(s)
+ 3NaNO3
(aq)
10. A solution containing 3.44 g of AgNO3 is mixed with a solution containing 4.22 g of K3PO4. A precipitate of
Ag3PO4 forms. What mass of Ag3PO4 is produced?
11.
100.0 mL of 0.200 M aqueous potassium hydroxide is mixed with 100.0 mL of 0.200 M aqueous magnesium
nitrate. What mass of magnesium hydroxide is formed? What is/are the concentration of any ions remaining in
solution?
Acid-Base Reactions
12. Calculate the molarity of a sodium hydroxide solution if 10.42 mL of this solution are needed to neutralize 25.00
mL of 0.2042 M oxalic acid. H2C2O4
13. A 10.0 mL volume of 3.0 M KOH
(aq)
(aq)
+ 2NaOH
(aq)

is transferred to a 250 mL volumetric flask and diluted to the mark. It was
found that 38.5 mL of this diluted solution was needed to reach the equivalence point in a titration of 10.0 mL
of
a
H3PO4
solution
according
to
the
What is the molar concentration of the H3PO4 in solution?
reaction:
KOH
(aq)
+
H3PO4
(aq)
