Lesson Notes By Weeks and Term - Senior Secondary 2

TERM׃ 3^RD 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.

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

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively