Lesson Notes By Weeks and Term - Senior Secondary 1

Acids, bases, and salts III

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Term: 2nd Term

Week: 11

Class: Senior Secondary School 1

Age: 15 years

Duration: 40 minutes of 5 periods each

Date:       

Subject:      Chemistry

Topic:-       Acids, Bases and Salts III

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

  1. Explain Deliquescent, efflorescent and Hygroscopic substances

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 reviews the previous lesson on neutralization and the preparation of soluble and insoluble salts

Students pay attention

STEP 2

EXPLANATION

He explains deliquescent and efflorescent

 

Students pay attention and participates

STEP 3

DEMONSTRATION

He explains hygroscopic substances

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

ACIDS, BASES AND SALTS

HYGROSCOPIC, DELIQUESCENT AND EFFLORESCENT SUBSTANCES

  1. Hygroscopic substances are capable of absorbing water from the air and not dissolving in it. Silica gel, conc. H2SO4, MgCO3, K2CO3, Ca
  2. Deliquescent substances are capable of absorbing moisture from the atmosphere and dissolving in it to form a solution. E.g anhydrous CaCl2, MgCl2, Cu(NO3)2, NaOH pellet
  3. Efflorescent substances these are capable of losing their water of crystallization when exposed to the atmosphere. E.g NaCO3.10.H2O, MgSO4.7H2O, CuSO4.5H2O

 

EVALUATION:    1. Write short notes on

  1. Hygroscopic substances
  2. Deliquescent substances
  3. Efflorescent substances

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively