Lesson Notes By Weeks and Term - Senior Secondary 2

Qualitative and quantitative analysis 2

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TERM׃ 3RD TERM

WEEK NINE

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 5 periods each

Date:

Subject: Chemistry

Topic:- Qualitative and quantitative analysis 2

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

  1. Test for oxidants
  2. Test for reductants

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers,

demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S

ACTIVITY

STEP 1

INTRODUCTION

The teacher explains the characteristics of oxidants, then aid students to carry out test for oxidants

 

Students pay

attention

STEP 2

EXPLANATION

Teacher explains the characteristics of reductants to the students and also assist them to carry out test for reductants.

Students pay

attention and

participate

STEP 3

NOTE TAKING

The teacher writes a summarized

note on the board

The students

copy the note in

their books

 

NOTE

QUALITATIVE ANALYSIS 2

Test for oxidants and reductants

Testing for presence of oxidising agent:

  1. Add a reducing agent, e.g. Aqueous potassium iodide to the oxidising agent.
  2. Shake the mixture.
  3. A brown solution of iodine is produced.
  4. The presence of iodine can be confirmed by adding starch solution.
  5. A dark blue coloration is obtained.

Testing for presence of reducing agent:

  1. Add an oxidising agent, e.g. Aqueous potassium manganate (VII) to the reducing agent
  2. Shake the mixture
  3. The aqueous potassium manganate (VII) is decolourised.

EVALUATION:   1. Explain how can you test for the presence of oxidizing agents.

  1. Explain how can you test for the presence of reducing agents

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively