CP Chemistry
Name: ______________________________________ Date: ________________ Mods: __________
HSPA Week: Stoichiometry Practice Packet
Reaction #1:
2 AlBr3 (aq) + 3 K2SO4 (aq)  6 KBr (aq) + Al2(SO4)3 (aq)
a) Determine the molar masses of each reactant and product:
AlBr3 = ______________________
K2SO4 = _____________________
KBr = _______________________
Al2(SO4)3 = ____________________
b) If 42.7 grams of potassium bromide (KBr) are going to be produced by this reaction, how many
moles of aluminum bromide (AlBr3) would be needed?
c) If 13.5 moles of potassium sulfate (K2SO4) are used, how many moles of potassium bromide (KBr)
will be produced?
d) What mass, in grams, of aluminum sulfate (Al2(SO4)3) will be produced if 107 grams of aluminum
bromide (AlBr3) are used in the above reaction?
e) If 62.6 moles of potassium sulfate (K2SO4) were produced, how many grams of aluminum bromide
(AlBr3) were used?
Reaction #2:
______ Fe2O3 (s) + ______H2 (g)  ______Fe (s) + ______H2O (l)
a) Balance the equation above
b) Determine the molar masses of each reactant and product:
Fe2O3 = ______________________
H2 = _____________________
Fe = _______________________
H2O = ____________________
c) What is the molar ratio between hydrogen gas and iron metal?
d) How many grams of iron metal (Fe) will be produced when 15.6 moles of hydrogen gas (H2) are
used?
e) How many grams if iron (III) oxide (Fe2O3) are required to react with 75.5 grams of hydrogen gas?
f)
If 28.3 moles of iron metal are produced during the reaction, how many moles of water would also
be produced?
g) If 36 grams of water are produced by the above reaction. how many moles of iron (Fe) will also be
produced?
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Reaction #3:
The combustion of propane, C5H12, in oxygen gas
produces carbon dioxide gas and water vapor
a) Write the balanced equation for the combustion of propane, C5H12.
b) What is the molar ratio between propane (C5H12) and carbon dioxide?
c) If 44.8 grams of propane (C5H12) are burned, how many moles of carbon dioxide will be produced?
d) What mass, in grams, of oxygen gas is required to produce 35.1 moles of water vapor?
e) How many moles of carbon dioxide are produced when 142 moles of oxygen are produced
f)
If 233.9 grams of water were produced by the reaction above, how many grams of propane
(C5H12) must have been burned?
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Reaction #4:
sodium metal was placed in a solution of nickel (II) nitrate and
the reaction produced sodium nitrate and nickel metal
a) Write the balanced equation for the single replacement reaction written above:
b) Determine the molar masses of each reactant and product:
nickel = ____________________
nickel (II) nitrate = ____________________
sodium nitrate = _____________________
sodium = ___________________
c) How many moles of nickel (II) nitrate will are required when 67.6 moles of sodium were used?
d) If 11.5 grams of nickel metal were produced, how many grams of sodium nitrate were also
produced by the reaction?
e) If 99.9 grams of sodium were used in the above reaction, how many moles of sodium nitrate
where produced?
f)
How many grams of nickel (II) nitrate would be needed if 43.8 grams of nickel are produced?