Demo’s with Reaction Types
& Stoichiometry
Name:______________________________
Period:_______
Directions: For each Demo, identify the type of reaction (Single Replacement, Double Replacement,
Combination, Decomposition, or Combustion). Write a complete, balanced equation for the entire reaction.
Then, complete any stochiometric calculations about each reaction.
Reaction #1: Skittles are composed of primarily sucrose, C11H22O11. Enjoy the burning of these skittles.
Reaction Type:___________________________Write complete balanced equation:
Stoichiometry: If we completely combust 36.6 moles of oxygen, how many moles of sugar are burned?
Stoichiometry: If we produce 0.100 L of carbon dioxide (assuming STP) how many molecules of water
are also produced?
Reaction #2: When heated, potassium chlorate decomposes into potassium chloride and oxygen gas.
Reaction Type:__________________________Write complete balanced equation:
Stoichiometry: If create 2.9 moles of oxygen gas, how many moles of potassium chlorate
decomposed?
Reaction #3: Ethanol (C2H6O) reacts with oxygen to completely combust. The demo the spark plug set up
should make the point.
Reaction Type:__________________________Write complete balanced equation:
Stoichiometry: When 0.325 moles of ethanol react completely during a lab, how many grams of
carbon dioxide would be produced assuming complete combustion?
Stoichiometry: In order to react exactly 2.24 liters of oxygen gas, how many moles of ethanol must be
consumed?
Reaction #3: A solution of barium chloride mixes with a solution of copper(II) sulfate to form a neat
precipitate of barium sulfate. Another ionic compound is produced, but it remains dissolved.
Reaction Type:__________________________Write complete balanced equation:
Stoichiometry: In order to produce 300.0 grams of barium sulfate, how many formula units of barium
chloride must be used up in the reaction?
Reaction #4: Aqueous silver nitrate reacts with copper wire. Copper (II) nitrate is one of the products.
Reaction Type:__________________________Write complete balanced equation:
Limiting Reagent: What is the limiting reagent if we put 2.00 g of copper wire and react the copper
with 1.39 g of silver nitrate?
Percent Yield: If we obtain 0.75 g of actual silver, what is our percent yield for this demo?
Reaction #5: Iron reacts with sulfur to make Iron (III) sulfide.
Reaction Type:__________________________Write complete balanced equation:
Limiting Reagent: We reacted 2.00 g of iron with 2.00 grams of sulfur (S8). Which reactant was the
limiting reagent?
Percent Yield: If we obtained 3.30 g of Iron (III) sulfide, what is our percent yield?