Lesson Notes By Weeks and Term - Senior Secondary 2

Halogens 2

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TERM: 2ND TERM

WEEK SEVEN

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 5 periods each

Date:        

Subject: Chemistry

Topic:  HALOGENS 2

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

  1. identify compounds of halogens.
  2. Identify the uses of Halogens.
  3. Discuss the preparation of chlorine.

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 discusses the compounds of halogens.

Students pay attention

STEP 2

EXPLANATION

He explains the uses of halogens

 

Students pay attention and participates

STEP 3

DEMONSTRATION

He discusses the preparation of chlorine.

Students pay attention and participate

STEP 4

NOTE TAKING

The teacher writes a summarized note on the board

The students copy the note in their books

 

NOTE

HALOGENS 2

Compounds of Halogens

 

Uses of Halogens

  1. Chlorine (Cl):

   - Water Treatment: Chlorine is widely used to disinfect water in municipal water treatment plants, killing bacteria and other harmful microorganisms.

   - Bleaching Agent: Used in the production of bleach, which is employed in laundry and cleaning processes.

   - PVC Production: Chlorine is a key component in the production of polyvinyl chloride (PVC), a versatile plastic.

  1. Bromine (Br):

   - Flame Retardants: Bromine compounds are used as flame retardants in various materials, such as textiles and plastics, to reduce the risk of fire.

   - Pharmaceuticals: Bromine compounds have pharmaceutical applications, including certain medications.

  1. Iodine (I):

   - Disinfectant: Iodine is used as an antiseptic and disinfectant in the form of tinctures and solutions.

   - Nutrition: Iodine is an essential element for the thyroid gland, and iodine compounds are used to fortify salt to prevent iodine deficiency.

   - Starch Test: Iodine solution is employed in the starch test to detect the presence of starch in various substances.

 

EVALUATION: - Mention two compounds of halogens, given chemical equations respectively.

                          -  Identify the 2 uses of any three halogens.

                          - Discuss briefly, the preparation of chlorine.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively.