KLB Form 2 Chemistry Schemes of Work Term 3 2020/2021

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             SCHEMES OF WORK      FORM TWO CHEMISTRY        TERM THREE 2020/2021
WK NO. L/NO. TOPIC/ SUBTOPIC LESSON/ SPECIFIC OBJECTIVES TEACHING/ LEARNING ACTIVITIES MATERIALS/ RESOURCES REFERENCES REMARKS
 1     1 Effects of heat on carbonates

To state effects of heat on carbonates.                                To predict products resulting from heating metal carbonates

Group experiments- To investigate effects of heat on Na2CO3, K2CO3, CaCO3, ZnCO3, PbCO3, e. t. c. Observe various color changes before, during and after heating.                Write equations for the reactions.

Various carbonates. KLB BOOK II PP 108-109  
  2 Effects of heat on nitrates

To state effects of heat on nitrates.    To predict products resulting from heating metal nitrates

Group experiments- To investigate effects of heat on various metal nitrates.            Observe various color changes before, during and after heating.                                      Write equations for the reactions

Common metal nitrates. PP 110-111   
 3,4 Effects of heat on sulphates.

To state effects of heat on Sulphates.  To predict products results from heating metal sulphates.

Group experiments- To investigate effects of heat on various Sulphates.          Observe various color changes before, during and after heating.          Write equations for the reactions

Common Sulphates PP 113  
     2     1 Hygroscopy, Deliquescence and Efflorescence

To define hygroscopic deliquescent and efflorescent salts.    To give examples of hygroscopic deliquescent and efflorescent salts.

Prepare a sample of various salts.                Expose them to the atmosphere overnight. Students classify the salts as hygroscopic, deliquescent and / or efflorescent.

  PP 114  
  2 Uses of salts. To state uses of salts Teacher elucidates uses of salts   PP 114  
 3,4  

EFFECTS OF AN ELECTRIC CURRENT ON SUBSTANCES. Electrical conductivity

To test for electrical conductivities of substances.

Group experiments- to identify conductors and non-conductors.            Explain the difference in (non) conductivities.

Various solids, bulb, battery,  & wires PP 118-119  
  3  1,2 Molten electrolytes. To test for electrical conductivities molten electrolytes.

Group experiments- to identify electrolytes in molten form.              Explain the difference in molten electrolytes.

Molten candle wax Sugar Sulphur Lead oxide.

PP 120-121  
 3,4 Electrolysis.

To define electrolysis            To describe the process of electrolysis in terms of charge movement.

Descriptive approach punctuated with Q/A.      
  4   1,2

Aqueous electrolytes.  Electrodes.  

To define an electrolyte            To test for electrical conductivities of electrodes.

To investigate chemical effect of an electric current. Classify the solutions as electrolyte or non -electrolytes.      Discuss the electrical properties of the solutions.

Graphite electrodes Battery Various aqueous solutions switch bulb.

PP 122-123  
 3,4 Reaction on electrodes.  To describe half- equation reactions at the cathode and anode

To demonstrate –Electrolysis of molten lead (II) bromide  Observe color changes Explanation of half-equations and reactions at the electrodes.

Graphite electrodes Battery Various aqueous solutions switch.

PP 126-127  
 5  1,2 Binary electrolyte.

To define a binary electrolyte.            To state the products of a binary electrolyte.

Completing a table of electrolysis of binary electrolytes.   PP 127  
 3 Application of electrolysis. To state the application of electrolysis Discussion and explanations   PP 128  
 4 Electroplating To describe electroplating process                                                        

Experiment- Left overnight.  Electroplating an iron nail with silver nitrate/ copper sulphate.            Brief discussion.

Silver nitrate Iron nail Complete circuit battery.

PP 129-130  
 6  1                     Topic assessment
 2

CARBON AND SOME OF ITS COMPOUNDS. Allotropy.                                  

Define allotropes and allotropy. Identify allotropes of carbon.  Represent diamond and graphite diagrammatically.

Teacher exposes new terms.                        Review covalent bond. Discuss boding in diamond and graphite.

  PP 131-133  
 3,4 Physical and chemical properties of diamond, graphite and amorphous carbon

Describe physical and chemical properties of diamond, graphite and amorphous carbon.                State uses of carbon allotropes.

Discuss physical and chemical properties of diamond, graphite and amorphous carbon.      Explain the Physical and chemical properties of diamond, graphite and amorphous carbon.        Discuss uses of carbon allotropes.

Charcoal, graphite PP 134-135  
 7  1 Burning carbon and oxygen Describe reaction of carbon with oxygen. Teacher demonstration- Prepare oxygen and pass dry oxygen into a tube containing carbon. Heat the carbon. Observe effects on limewater. Carbon, limewater, tube, limewater stand& Bunsen burner. PP 134- 135  
 2 Reduction properties of carbon.

Describe reduction properties of carbon. Show reduction properties of carbon.

Teacher demonstration – Burn strongly a mixture of carbon and CuO on a bottle top.      Observe color changes and give underlying explanation

CuO, pounded charcoal, Bunsen burner& bottle top PP 126  
 3&4 

Reaction of carbon with acids.

      Preparation of CO2.

Describe reaction of carbon with acids.

 

Prepare CO2 in the lab.

Teacher demonstration- reaction of carbon with hot conc. HNO3.            Write balanced equations for the reaction.                Review effects of heat on carbonates.              Group experiments/teacher demonstration- preparation of  CO2.

Conc. HNO3, Limewater. PP 126  
 8  1,2 Properties of CO2. Describe properties of CO2.

Simple experiments to determine properties of CO2.

Discuss the observations.

Lime water, Magnesium ribbon, Universal indicator,    lit candle.

PP 138-139  
 3,4 Chemical equations for reactions involving CO2. Write a balanced CO2. Give examples of reactions. Write corresponding balanced chemical equations.   PP 139-140  
 9  1 Uses of CO2. State uses of CO2 Discuss briefly the uses of co2   PP 140-141  
 2 Carbon monoxide lab preparation. To describe preparation of carbon monoxide in the lab

Teacher demonstration: preparation of carbon monoxide in the lab.      Make observations.

  PP 142-143  
 3 Chemical properties of carbon monoxide. To describe chemical properties of carbon monoxide.

Description of properties of carbon monoxide.      Discussion and writing of  chemical equations.

  PP 144-145  
 4 Carbonates and hydrogen carbonates.

To state the difference between carbonates and hydrogen carbonates.            To describe chemical reactions of carbonates and hydrogen carbonates with acids.

Observe reactions of carbonates of Ca, Cu, Zn, NaHCO3 with HCl, HNO3, and H2SO4.

Record observations in a table.

Carbonates of Ca, Cu, Zn, NaHCO3 with HCl, HNO3, and H2SO4.

PP 148-149  
 10   1 Carbonates and hydrogen carbonates. To write chemical equations for reactions of carbonates and hydrogen carbonates with acids.

Discuss the observations above.                                  Write chemical equations for the reactions.

     
  2 Heating carbonates and hydrogen carbonates. To investigate reactions of carbonates and hydrogen carbonates on heating. To investigate reactions of carbonates and hydrogen carbonates on heating. Various carbonates and hydrogen carbonates.    
 3,4 Heating carbonates and hydrogen carbonates. To write equations for reaction of carbonates and hydrogen carbonates on heating.

Discuss the above observations.                Write corresponding balanced equations.

  PP 150-151  
 11  1 Extraction of sodium carbonate from trona. To draw schematic diagram for extraction of sodium carbonates.

Discuss each step of the process.                      Write relevant equations.

  PP 153-157  
 2 Solvay process of preparing sodium carbonate. To draw schematic diagram for extraction of sodium carbonates.

Discuss each step of the process.

Write relevant equations.

     
 3,4

Importance of carbon in nature.          & its        effects on the environment.

To discuss: - Importance of carbon in nature.   &                    Effects of carbon on the environment.

Discuss the carbon cycle and processes that increase/ reduce amount of CO2 in the air.                          Uses of CO2 in soft drinks and fire extinguishers.

  PP 157-158  
 12   13                                        END OF YEAR EXAMS
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