SCH4C
Classifying Chemical Reactions
Name:_____________________________
Partner’s Name:____________________
Date:______________________________
Warm Up
1. Name the type of reaction (4 marks, K)
a) NaBr + Ca(OH)2  CaBr2 + NaOH
Type of reaction: _________________________________
b) NH3+ H2SO4 (NH4)2SO4
Type of reaction: _________________________________
c) Pb + H3PO4  H2 + Pb3(PO4)2
Type of reaction: _________________________________
d) HgO  Hg + O2
Type of reaction: _________________________________
2. Come up with a NEW analogy for each type of reaction and DRAW a picture for each. (4 marks, I)
a) synthesis
b) decomposition
c) single displacement
d) double displacement
Revised Feb 2013
SCH4C Lab 1.4
Classifying Chemical Reactions
Objectives:



perform and classify different chemical reactions
identify the reactants and products of each reaction
write and balance equations for each reaction
Materials: Materials will be provided for you at each station. You MUST wear goggles at all times, or you
will be removed from the lab.
Procedure:
1. This lab is divided into stations. Follow the instructions at each station carefully.
2. Record the reactants for each reaction in Table 1.
3. Record observations for each reaction in Table 1. Include any changes in colour, clarity or state,
gas formation, temperature changes, or other evidence of energy being released.
Table 1: Observing Various Chemical Reactions
Station
A
Reactants
Observations
B
C
D
E
F
G
/7 C reactant names
/7 I colour, clarity, state
/7 other
Revised Feb 2013
Discussion Questions
1. For each reaction, write the balanced chemical equation including the states, and name the type of reaction
that occurred.
Station
A
Balanced Chemical Equation
Type of Reaction
B
C
D
E
F
G
/7 I reactants
/7 I products
/7 K states
/7 K
Revised Feb 2013
2. How can you tell if a chemical reaction has occurred? What did you look for? (3 marks, K)
3. For reaction A and B:
a) What colour is the CuSO4 ∙5 H2O ? (1 mark, I)
b) What colour is the CuSO4 ? (1 mark, I)
4. For reaction C:
a) What gas was formed in this reaction? (1 mark, I)
b) What gas test would you use to confirm that this gas was formed? Explain. (2 marks, I)
5. For reaction D:
a) What gas was formed in this reaction? (1 mark, I)
b) Name a different metal you could add to HCl to produce the same type of gas? (2 marks, I)
Hint: Use your Metal Activity Series
6. For reaction E and G:
a) What formed when the reactants were combined? (1 mark, I)
b) Name a different compound you could add to copper(II)chloride to form a precipitate. (2 marks, I)
Hint: Use your Solubility Table
7. For reaction:
a) What happened to the nail? (1 mark, I)
b) Explain why this happened. (1 mark, I)
Revised Feb 2013
STATION A
Reactant:
Copper(II)sulfate pentahydrate (CuSO4 5H2O)
Procedure:
1. Record the reactant in your table.
2. Place a piece of copper(II)sulfate pentahydrate in a dry test tube in a wooden test tube
rack. Do not use a plastic test tube rack because it might melt when the test tube gets
hot!!!
3. Have a test tube holder ready to use.
4. Follow the ‘How to Light a Bunsen Burner’ instructions carefully and adjust the Bunsen
burner until you have a blue flame.
5. Pointing the test tube away from others, heat the copper(II) sulfate in the test tube until
you see a change in its appearance. (1-2 minutes).
6. Let the hot test tube cool in the wooden test tube rack. You will need the product for
Station B.
7. Record your observations.
STATION B
Reactant:
Copper(II)sulfate (CuSO4)
Water
Procedure:
1. Record the reactants in your table.
2. Add a few drops of water the product from your reaction in 1A.
3. Record your observations.
4. Dump the products into the blue waste beaker.
Revised Feb 2013
STATION C
Reactants:
calcium metal * Be very careful !! This metal is REACTIVE!!!!!
water
Procedure:
1. Record the reactants in your table.
2. Fill a beaker half full with water.
3. Using the tweezers add a small piece of calcium metal to the water in the beaker
4. Describe the reaction that is occurring in your table.
5. Dispose of the calcium and liquid in the waste beaker.
6. Wash the beaker.
STATION D
Reactants:
3 mol/L hydrochloric acid (HCl)  This acid will burn your skin. Wash your hands
immediately if you spill any.
Mossy zinc metal
Procedure:
1. Record the reactants in your table.
2. In the test tube place about 2 cm of hydrochloric acid.
3. Use a scoopula to add a small amount of zinc to the test tube.
4. Record your observations.
5. Pour the product into the waste beaker.
6. Wash the test tube.
Revised Feb 2013
STATION E
Reactants:
sodium hydroxide solution
copper(II)sulfate
Procedure:
1. Record the reactants in your table.
2. In a small test tube place about 2 cm of sodium hydroxide.
3. Add a few drops of copper(II)sulfate to the test tube.
4. Record your observations (use the centrifuge if needed)
5. Pour the products in the waste beaker.
6. Wash the test tubes.
2
cm
STATION F
Reactants:
Iron nail
copper (II) sulfate
Procedure:
1. Record the reactants in your table.
2. Use sandpaper to clean the iron nail before you begin.
3. Place the clean nail in a test tube and cover it with copper(II)sulfate solution.
4. After several minutes, pour off the liquid into the waste beaker.
5. Dump the nail onto a paper towel and examine the nail.
6. Record your observations.
Revised Feb 2013
STATION G
Reactants:
?
?
Procedure:
1. Use your solubility table to figure out which of the two reactants provided will result in a
double displacement reaction with a precipitate.
2. Add a few drops of each reactant to the test tube.
3. Record your observations. (use the centrifuge if necessary)
4. Pour the products into the waste beaker.
5. Wash your test tubes.
STATION H
Reactant:
hydrogen peroxide ( H2O2 ) <- Be very careful when pouring!
Wash hands immediately if you spill any!
Catalyst:
Potassium Iodide
*The catalyst is a substance that does not get used up in the reaction. It is not one of the
reactants, it just helps make the reaction go faster.
When writing the chemical equation, write the catalyst above the arrow.*
Procedure:
1. Record the reactant in your table.
2. Fill a small graduated cylinder with 5 mL of hydrogen peroxide.
3. In a large graduated cylinder put 2 drops of dish soap and use a scoopula to add a few
crystals of potassium iodide.
4. Add the hydrogen peroxide to the large graduated cylinder and record your observations.
5. The products can be washed down the sink with lots of water.
8. Wash the graduated cylinders.
Revised Feb 2013