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WK | LSN | TOPIC | SUB-TOPIC | OBJECTIVES | T/L ACTIVITIES | T/L AIDS | REFERENCE | REMARKS |
---|---|---|---|---|---|---|---|---|
3 | 1 |
ELECTRO-CHEMISTRY.
|
Redox reactions.
|
By the end of the lesson, the learner should be able to:
Describe redox reactions in terms of gain / loss of electrons. Identify oxidizing / reducing agents involved in redox reactions. |
Q/A: review cations, anions and charges. Write down ionic half equations and identify reducing / oxidizing agents. |
student book
|
K.L.B. BK IV
Pages 108-9 |
|
3 | 2 |
ELECTRO-CHEMISTRY.
|
Redox reactions.
|
By the end of the lesson, the learner should be able to:
Describe redox reactions in terms of gain / loss of electrons. Identify oxidizing / reducing agents involved in redox reactions. |
Q/A: review cations, anions and charges. Write down ionic half equations and identify reducing / oxidizing agents. |
student book
|
K.L.B. BK IV
Pages 108-9 |
|
3 | 3-4 |
ELECTRO-CHEMISTRY.
|
Oxidizing Numbers.
|
By the end of the lesson, the learner should be able to:
Outline rules of assigning oxidation numbers. Determine the oxidation numbers of an element in a given compound. Explain the use of oxidation numbers in naming compounds. |
Exposition and giving specific examples.
Work out oxidizing number of elements in given compounds. Copy and complete a table of compounds containing elements that more than one oxidation number. |
student book
|
K.L.B. BK IV
Pages 109-116 |
|
3 | 5 |
ELECTRO-CHEMISTRY.
|
Displacement reactions.
|
By the end of the lesson, the learner should be able to:
Explain change of oxidation numbers during redox / displacement reactions. Arrange elements in order of their reducing power. |
Class standard experiments: reacting metals with solutions containing metal ions.
Taking note of reactions and those that do not take place; and tabulating the results. |
Metals: Ca, Na, Zn, Fe, Pb, and Cu.
Solutions containing Ca2+, Mg2+, Zn2+, Fe2+. |
K.L.B. BK IV
Pages 116-120 |
|
4 | 1 |
ELECTRO-CHEMISTRY.
|
The oxidizing power of an element.
|
By the end of the lesson, the learner should be able to:
Arrange elements in order of their oxidizing power. |
Teacher demonstration / group expts:
Adding halogens to solutions containing halide ions. Tabulate the results. Discuss the results and arrive at the oxidizing power series of halogens. |
Halogens:
Cl2 (g), Br2 (l), I2 (s). Halides: KCl, KBr, KI. |
K.L.B. BK IV
Pages 120-122 |
|
4 | 2 |
ELECTRO-CHEMISTRY.
|
The oxidizing power of an element.
|
By the end of the lesson, the learner should be able to:
Arrange elements in order of their oxidizing power. |
Teacher demonstration / group expts:
Adding halogens to solutions containing halide ions. Tabulate the results. Discuss the results and arrive at the oxidizing power series of halogens. |
Halogens:
Cl2 (g), Br2 (l), I2 (s). Halides: KCl, KBr, KI. |
K.L.B. BK IV
Pages 120-122 |
|
4 | 3-4 |
ELECTRO-CHEMISTRY.
|
The oxidizing power of an element.
|
By the end of the lesson, the learner should be able to:
Arrange elements in order of their oxidizing power. |
Teacher demonstration / group expts:
Adding halogens to solutions containing halide ions. Tabulate the results. Discuss the results and arrive at the oxidizing power series of halogens. |
Halogens:
Cl2 (g), Br2 (l), I2 (s). Halides: KCl, KBr, KI. |
K.L.B. BK IV
Pages 120-122 |
|
4 | 5 |
ELECTRO-CHEMISTRY.
|
Cell diagrams.
|
By the end of the lesson, the learner should be able to:
Define the terms electrode, potential and e.m.f. of an electrochemical cell. Describe components of a cell diagram. Draw cell diagrams using correct notations. |
Teacher demonstration: Zinc/ copper cell.
Q/A & discussion: changes in oxidation numbers. Exposition: cell diagram and deducing the direction of electron flow. |
Zinc/ copper cell.
|
K.L.B. BK IV
Pages 123-128 |
|
5 | 1 |
ELECTRO-CHEMISTRY.
|
Standard Electrode Potentials.
|
By the end of the lesson, the learner should be able to:
Identify standard conditions for measuring electrode potentials. Define the term standard electrode potential of a cell. Write half reactions of electrochemical cells. |
Descriptive and expository approaches: teacher exposes new concepts.
|
student book
|
K.L.B. BK IV
Pages 129-131 |
|
5 | 2 |
ELECTRO-CHEMISTRY.
|
Standard Electrode Potentials.
|
By the end of the lesson, the learner should be able to:
Identify standard conditions for measuring electrode potentials. Define the term standard electrode potential of a cell. Write half reactions of electrochemical cells. |
Descriptive and expository approaches: teacher exposes new concepts.
|
student book
|
K.L.B. BK IV
Pages 129-131 |
|
5 | 3-4 |
ELECTRO-CHEMISTRY.
|
Standard Electrode Potentials.
Standard electrode potential series. |
By the end of the lesson, the learner should be able to:
Identify standard conditions for measuring electrode potentials. Define the term standard electrode potential of a cell. Write half reactions of electrochemical cells. Recall the order of standard electrode potentials. Compare oxidizing and reducing powers of substances. |
Descriptive and expository approaches: teacher exposes new concepts.
Q/A: review reactivity series, oxidizing agent, reducing agent. Exposition: the order of standard electrode potentials. Discussion: oxidizing and reducing powers of substances. |
student book
|
K.L.B. BK IV
Pages 129-131 K.L.B. BK IV Pages 131-133 |
|
5 | 5 |
ELECTRO-CHEMISTRY.
|
Standard electrode potential series.
|
By the end of the lesson, the learner should be able to:
Recall the order of standard electrode potentials. Compare oxidizing and reducing powers of substances. |
Q/A: review reactivity series, oxidizing agent, reducing agent.
Exposition: the order of standard electrode potentials. Discussion: oxidizing and reducing powers of substances. |
student book
|
K.L.B. BK IV
Pages 131-133 |
|
6 | 1 |
ELECTRO-CHEMISTRY.
|
Emf of a cell.
|
By the end of the lesson, the learner should be able to:
Calculate emf of a cell using standard electrodes potentials. |
Q/A: review half-cells.
Worked examples; supervised practice. Assignment. |
student book
|
K.L.B. BK IV
Pages 133-136 |
|
6 | 2 |
ELECTRO-CHEMISTRY.
|
Emf of a cell.
|
By the end of the lesson, the learner should be able to:
Calculate emf of a cell using standard electrodes potentials. |
Q/A: review half-cells.
Worked examples; supervised practice. Assignment. |
student book
|
K.L.B. BK IV
Pages 133-136 |
|
6 | 3-4 |
ELECTRO-CHEMISTRY.
|
Emf of a cell.
Possibility of a reaction to take place. |
By the end of the lesson, the learner should be able to:
Calculate emf of a cell using standard electrodes potentials. Predict whether a reaction will take place or not using standard electrode potentials. |
Q/A: review half-cells.
Worked examples; supervised practice. Assignment. Worked examples. Oral exercise. Assignment. |
student book
|
K.L.B. BK IV
Pages 133-136 K.L.B. BK IV Pages 136-137 |
|
6 | 5 |
ELECTRO-CHEMISTRY.
|
Possibility of a reaction to take place.
|
By the end of the lesson, the learner should be able to:
Predict whether a reaction will take place or not using standard electrode potentials. |
Worked examples.
Oral exercise. Assignment. |
student book
|
K.L.B. BK IV
Pages 136-137 |
|
7 | 1 |
ELECTRO-CHEMISTRY.
|
Primary and secondary chemical cells.
|
By the end of the lesson, the learner should be able to:
Describe the functioning of primary and secondary chemical cells. |
Exposition of new concepts and brief discussion
Assignment. |
student book
|
K.L.B. BK IV
Pages 138-141 |
|
7 | 2 |
ELECTRO-CHEMISTRY.
|
Primary and secondary chemical cells.
|
By the end of the lesson, the learner should be able to:
Describe the functioning of primary and secondary chemical cells. |
Exposition of new concepts and brief discussion
Assignment. |
student book
|
K.L.B. BK IV
Pages 138-141 |
|
7 | 3-4 |
ELECTRO-CHEMISTRY.
|
Electrolysis of dilute NaCl.
|
By the end of the lesson, the learner should be able to:
Define the term electrolysis. Explain the concept of preferential discharge of ions. |
Teacher demonstration: electrolysis of dilute sodium chloride with carbon electrodes.
Test for gases collected. Write down equations of reactions at each electrode. Discussion: preferential discharge of ions at electrodes. |
Dilute sodium chloride voltameter.
|
K.L.B. BK IV
Pages 141-144 |
|
7 | 5 |
ELECTRO-CHEMISTRY.
|
Electrolysis of dilute NaCl.
|
By the end of the lesson, the learner should be able to:
Define the term electrolysis. Explain the concept of preferential discharge of ions. |
Teacher demonstration: electrolysis of dilute sodium chloride with carbon electrodes.
Test for gases collected. Write down equations of reactions at each electrode. Discussion: preferential discharge of ions at electrodes. |
Dilute sodium chloride voltameter.
|
K.L.B. BK IV
Pages 141-144 |
|
8 | 1 |
ELECTRO-CHEMISTRY.
|
Electrolysis of brine.
|
By the end of the lesson, the learner should be able to:
Identify products of electrolysis of brine. |
Teacher demonstration/ group experiments.
Test for the products of electrolysis. Write relevant equations. |
Brine voltameter.
|
K.L.B. BK IV
Pages 144-146 |
|
8 | 2 |
ELECTRO-CHEMISTRY.
|
Electrolysis of brine.
|
By the end of the lesson, the learner should be able to:
Identify products of electrolysis of brine. |
Teacher demonstration/ group experiments.
Test for the products of electrolysis. Write relevant equations. |
Brine voltameter.
|
K.L.B. BK IV
Pages 144-146 |
|
8 | 3-4 |
ELECTRO-CHEMISTRY.
|
Electrolysis of brine.
Electrolysis of dilute sulphuric (VI) acid. |
By the end of the lesson, the learner should be able to:
Identify products of electrolysis of brine. Identify products of electrolysis of dilute sulphuric (VI) acid. |
Teacher demonstration/ group experiments.
Test for the products of electrolysis. Write relevant equations. |
Brine voltameter.
Sulphuric acid voltameter. |
K.L.B. BK IV
Pages 144-146 K.L.B. BK IV Pages 146-148 |
|
8 | 5 |
ELECTRO-CHEMISTRY.
|
Factors affecting electrolysis.
|
By the end of the lesson, the learner should be able to:
Explain factors that affect electrolytic products discharged at electrodes. |
Q/A: review the electrochemical series of elements.
Teacher writes down order of ease of discharge of ions at electrodes. Discussion: other factors; giving suitable examples. |
student book
|
K.L.B. BK IV
Pages 153-5 |
|
9 | 1 |
ELECTRO-CHEMISTRY.
|
Application of electrolysis.
|
By the end of the lesson, the learner should be able to:
Describe some applications of electrolysis. |
Probing questions and brief discussion on applications of electrolysis.
Practical assignment on electrolysis: electroplating an iron nail with a suitable metal. |
Suitable voltameter.
|
K.L.B. BK IV
Pages 155-7 |
|
9 | 2 |
ELECTRO-CHEMISTRY.
|
Application of electrolysis.
|
By the end of the lesson, the learner should be able to:
Describe some applications of electrolysis. |
Probing questions and brief discussion on applications of electrolysis.
Practical assignment on electrolysis: electroplating an iron nail with a suitable metal. |
Suitable voltameter.
|
K.L.B. BK IV
Pages 155-7 |
|
9 | 3-4 |
ELECTRO-CHEMISTRY.
|
Application of electrolysis.
Faraday?s law of electrolysis. |
By the end of the lesson, the learner should be able to:
Describe some applications of electrolysis. State Faraday?s law of electrolysis. Solve problems related to Faraday?s law of electrolysis. |
Probing questions and brief discussion on applications of electrolysis.
Practical assignment on electrolysis: electroplating an iron nail with a suitable metal. Discuss above results, leading to Faraday?s law of electrolysis. Worked examples. Assignment. |
Suitable voltameter.
Weighing balance, stop watch, copper sulphate voltameter. |
K.L.B. BK IV
Pages 155-7 K.L.B. BK IV Pages 161-4 |
|
9 | 5 |
ELECTRO-CHEMISTRY.
|
Faraday?s law of electrolysis.
|
By the end of the lesson, the learner should be able to:
State Faraday?s law of electrolysis. Solve problems related to Faraday?s law of electrolysis. |
Discuss above results, leading to Faraday?s law of electrolysis.
Worked examples. Assignment. |
Weighing balance, stop watch, copper sulphate voltameter.
|
K.L.B. BK IV
Pages 161-4 |
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