Chemistry Lab Handout 13   "Types of Chemical Reactions"

 

Your Name:    ___________________________________ Role:______________

 

Lab Partners: ________________Role:_____   ________________Role:_____

 

Problem:  How can you recognize different types of chemical reactions?

 

Hypothesis:   _______________________________________________________

 

     _________________________________________________________________

 

     _________________________________________________________________

 

Materials:                        goggles                 3.0 M HCl

     medium test tube        watch glass             mossy Zinc

     Lead(II) Nitrate        Potassium Iodide        small test tube

     test tube rack          Magnesium metal              balance

     long-handled forceps         bunsen burner           burner striker

     test tube clamp              Copper(II) Carbonate         wood splint    
     sodium hydroxide        bromthymol blue indicator

 

Caution:

 

 

Procedure:  Part A: Acid Base Neutralization

1. Obtain goggles and wear them for the entire lab!

2. Remember that acid base neutralization reactions have the form:

          acid + base ® salt + water

3. Add one dropper full of 1.0 M Sodium Hydroxide into a medium test

     tube.

4. Add two drops of Bromthymol Blue indicator. Flick the tube to mix.

5. Add a drop of 3.0 M HCl and continue until you obtain a color

     change.

6. Record your observations and write the balanced chemical equation

     for the reaction.

 

Procedure:  Part B: Single Replacement Reactions

1. Remember that single displacement reactions have the form:

          A  +  BC  ®  AC  +  B

2. Place three droppers full of 3.0 M Hydrochloric Acid into a medium

     test tube.

3. Place a small piece of mossy Zinc into the test tube. Place

     this tube in the test tube rack and cover with a watch glass.

4. Record your observations and write the balanced chemical equation

     for the reaction.

5. After 3 minutes, light a wood splint and place it into the mouth of

     the test tube.

 

Procedure:  Part C: Double Replacement Reactions

1. Remember that double displacement reactions have the form:

          A+B-  +  C+D-  ®  A+D-  +  C+B-

2. Place 5 drops of 0.1 M Lead(II) Nitrate into a small test tube.

3. Add 5 drops of 0.2 M Potassium Iodide.

4. Record your observations and write the balanced chemical equation

     for the reaction.

Procedure:  Part D: Synthesis Reactions

1. Remember that synthesis reactions have the form:  A  +  B  ®  AB

2. Obtain a piece of Magnesium metal. Hold it with long handled

     forceps.

3. Light a bunsen burner with a striker and hold the Magnesium over the

     hottest part of the burner flame. Do not look directly at the

     light.

4. Record your observations and write the balanced chemical equation

     for the reaction.

 

Procedure:  Part E: Decomposition Reactions

1. Remember that decomposition reactions have the form: AB  ®  A  +  B

2. Place a small scoop of Copper(II) Carbonate crystals into a small

     dry test tube.     Observe the contents and record your observations.

3. Determine the initial mass of the tube and crystals to the nearest      0.001 g and record it in the data table.

4. Using a test tube clamp heat the crystals strongly for about 3

     minutes over the flame of a bunsen burner.

5. Light a wood splint, while still heating the crystals, and insert

     the lit wood splint into the mouth of the test tube. Record your

     observations. Don’t let any wood splint ash fall into the tube.

6. Let the test tube cool, observe the substance and write the balanced      chemical equation for the reaction.

7. Determine the final mass of the tube & crystals to the nearest

     0.001 g and the mass lost as a gas from the crystals and record it

     in the data table.

 

Procedure:      Part F: Combustion

1. Remember that combustion reactions have the form:

     CxHy   +   O2   ®   H2O   +   CO2

2. During the previous part of this experiment you used propane in the

     bunsen burner. Write the balanced chemical equation for the

     combustion of propane.

 

 

Observations:

     Description of HCl being added to the Sodium Hydroxide:

 

 

 

 

     Part A: balanced chemical reaction

 

 

 

 

     Description of Zinc reacting with Hydrochloric Acid:

 

 

 

 

     Part B: balanced chemical reaction

 

 

 

 

     Description of lit wood splint in the test tube:

 

 

 

 

     Description of Lead(II) Nitrate reacting with Potassium Iodide:

 

 

 

 

     Part C: balanced chemical reaction

 

 

 

 

     Description of Magnesium metal synthesis reaction:

 

 

 

 

     Part D: balanced chemical reaction

 

 

 

 

     Description of Copper(II) Carbonate crystals:

 

 

 

 

     Part E: balanced chemical reaction

 

 

 

 

     Result of lit wood splint in the test tube:

 

 

 

 

     Description of substance in test tube after cooling:

 

 

 

 

     Part F: balanced chemical reaction

 

 

 

 

Data:

initial mass of Copper(II) Carbonate and tube

 

final mass of Copper(II) Carbonate and tube

 

mass lost as a gas from Copper(II) Carbonate

 

Diagram:

 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

Conclusion:   _______________________________________________________

 

     _________________________________________________________________

 

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Questions:    Write a balanced chemical equation for each of the             following reactions and indicate the type of reaction.

 

1. Octane + Oxygen gas  ®   Water  +  Carbon Dioxide

2. Copper  +  Silver Nitrate  ®   Copper(II) Nitrate  +  Silver

3. Barium Chloride   ®   Barium  +  Chlorine gas

4. Sulfuric Acid + Potassium Hydroxide  ®   Potassium Sulfate + Water

5. Calcium Bromide + Sodium Iodide  ®  Calcium Iodide + Sodium Bromide

6. Iron  +  Oxygen gas   ®   Iron(III) Oxide

 

 

Answers: