Chemistry
Name
Period_________ Date_______
Chemical Reactions
STOICHIOMETRY WORKSHEET
1.
In a combustion reaction tricarbon octohydride reacts with oxygen.
(a)
Write the balanced equation for the reaction.
(b)
If you start with 14.8g of C3H8 and 3.44g of O2 determine the limiting reactant.
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(c)
Determine the number of moles of carbon dioxide produced.
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(d)
Determine the number of grams of water produced.
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(e)
Determine the number of grams of excess reagent left over in the reaction.
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C
2.
In a double replacement reaction aluminum sulfite and sodium hydroxide react.
(a)
Write the balanced equation for the reaction.
(b)
If you start with 10.0 g ofAl2(SO3)3 and 10.0g of NaOH determine the limiting reactant.
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(c)
Determine the number of moles of aluminum hydroxide produced.
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(d)
Determine the number of grams of sodium sulfite produced.
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(e)
Determine the number of grams of excess reagent left over in the reaction.
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1.
In a single replacement reaction of Iron (IV) and Aluminum oxide.
(a)
Write the balanced equation for the reaction.
(b)
If you start with 25.4g of Al2O3 and 10.2g of Fe determine the limiting reactant.
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(c)
Determine the number of moles of aluminum produced.
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(d)
Determine the number of grams of Iron (IV) oxide produced.
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(e)
Determine the number of grams of excess reagent left over after the reaction.
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Limiting Reactant Calculations
Set up problems on your paper just like the problems above.
1. When copper is heated with sulfur, copper (I) sulfide is formed. In a given experiment, 1.50
grams of copper was heated with 3 grams of sulfur to yield copper (I) sulfide.
a. Write the balanced chemical equation.
b. What is the limiting reactant?
c. What mass of copper (I) sulfide is formed?
d. What is the excess reactant?
e. What mass of excess reactant remains?
2. Anthraquinone (C14H8O2), an important intermediate in the dye industry, is produced from
the reaction of benzene (C6H6) with phthalic anhydride (C8H4O3), followed by dehydration
with sulfuric acid. The overall reaction is :
C8H4O3 + C6H6 C14H8O2 + H2O
a. What is the limiting reactant if 200 grams of benzene reacts with 350 grams of phthalic
anhydride?
b. Which reactant is the excess reactant?
c. What mass of excess reactant remains?
d. What mass of C14H8O2 is formed?
3. 6.0 grams of aluminum burns in 10 grams of bromine, in a synthesis reaction.
a. Write the balanced chemical equation.
b. What is the excess reactant?
c. What mass of excess reactant remains?
d. What is the limiting reactant?
e. What is the mass of product that was produced?
4. Ammonia (NH3) is produced from the reaction of nitrogen and hydrogen.
a. Write the balanced chemical equation.
b. What is the limiting reactant if 1000 grams of nitrogen and 500 grams of hydrogen are
mixed?
c. What mass of ammonia is formed?
d. What is the excess reactant?
e. What mass of excess reactant remains?