Meaning of Acids and Bases | Properties of Acids and Bases | Types of Acids and Bases | Uses of Acids and Bases Primary 5 (Basic 5)

Last Updated on December 17, 2020 by Alabi M. S.

 

GENERAL INFORMATION

BASIC SCIENCE

BASIC SCIENCE AND TECHNOLOGY

SECOND TERM  

WEEK 9

PRIMARY 5 

THEME – LIVING AND NON LIVING 

PREVIOUS LESSON – Meaning of Rock | Types of Rock | Uses of Rocks Primary 5 (Basic 5)

Rocks (Primary 5)

TOPIC – ACIDS AND BASES 

 

LEARNING AREA

1. Meaning and Properties of Acids

2. Meaning and Properties of Bases

3. Types of Acids and Bases

4. Uses of Acids and Bases

5. Revision and Test

 

PERFORMANCE OBJECTIVES 

By the end of the lesson, the pupils should have attained the following objectives (cognitive, affective and psychomotor) and should be able to –

1. give examples of acids and bases.

2. list some physical properties of acids and bases.

3. state types of acids and bases.

4. list some uses of acids and bases.

5. distinguish between acids and bases.

6. name local materials used in making soap.

7. identify the active ingredients in the local material used in making soap.

8. make soap from local materials.

9. state the uses of soap.

 

ENTRY BEHAVIOUR

As stated in the instructional materials.

 

INSTRUCTIONAL MATERIALS

The teacher will teach the lesson with the aid of:

1. Lemon

2. Wood ash

3. Water

4. Blue and red litmus papers

 

 

METHOD OF TEACHING 

Choose a suitable and appropriate methods for the lessons.

Note – Irrespective of choosing methods of teaching, always introduce an activities that will arouse pupil’s interest or lead them to the lessons. 

 

REFERENCE MATERIALS

1. Scheme of Work

2. 9 – Years Basic Education Curriculum

3. Course Book

4. All Relevant Material

5. Online Information

 

WRITING INSTRUCTION 

Copy as I write or draw as I need. This instruction should be given when you need the pupils to write or draw.

 

CONTENT OF THE LESSON  

LESSON 1 – INTRODUCTION 

Teacher’s Activities – Present slice ripe and unripe fruits like oranges, pawpaws, pineapples and mango for the pupils to taste and tell the different.

Pupil’s response – Sweet for ripe fruits and soar (bitter, uncommonly used) for unripe.

Teacher’s remark – Each of the unripe fruits taste sour because it contains acids. Give a great cheer for active and quick response. Discuss the meaning and properties of acids.

 

On board, copy as I write.

MEANING OF ACID 

Acids are chemical substances in almost liquid, commonly in unripe fruit.

 

EXAMPLES OR PROPERTIES OF ACID

Teacher’s Activities – One of the properties of acids is the taste – sour. Guide the pupils to test the unripe fruits with litmus paper and record their observations.

Pupil’s Activities – litmus paper turns red.

Teacher’s remark – Correct. Do not to taste or touch strong acids with your mouth (tongue) or hands because it can burn.

 

On board, copy as I write.

1. Acids taste sour.

2. It turns blue litmus paper to red.

 

 

3. Strong acids can burn skin when touched.

4. It conducts electricity.

 

On board, copy as I write.

TYPES OF ACIDS

1. Hydrochloric acid

2. Tetraoxosulphate (vi) acid

 

USES OF ACIDS 

Teacher’s/Pupil’s Activities – Discuss the uses of Acids.

 

On board, copy as I write.

1. It is used for bodies building – fruits and vitamins.

2. It used for manufacturing fertilizer, dye and explosives.

 

LESSON 2 – INTRODUCTION 

Teacher’s Activities – Guide the pupils to carry out the set of instructions:

1. Put a little of this solution in a test tube.

2. Bend the test tube and touch the solution with the tip of your middle finger.

3. Rub the solution between the tip of your middle finger and your thumb.

4. How does the solution feel?

5. Test the solution with lithium paper. And also, the mixture of wood ash and water.

Pupil’s response – The solution feels slippery with thumb and fingers? The lithium paper turns blue.

Teacher’s remark – The solution and the mixture of ash and water contains base which is the opposite of acid. Discuss the meaning and properties of bases.

 

On board, copy as I write.

MEANING OF BASE 

Bases are chemical substances opposite to acids.

 

EXAMPLES OR PROPERTIES OF BASES 

1. Bases have slippery or soapy feel.

2. Bases turn red litmus paper to blue.

 

TYPES OF BASES

1. Sodium hydroxide

2. Potassium hydroxide

 

USES OF BASES

Teacher’s/Pupil’s Activities – Discuss the uses of Bases.

 

On board, copy as I write.

1. It is used for cleaning.

 

 

2. It is used for manufacturing soaps, rayon and paper.

 

CLOSING REMARKS 

Acids and bases are two kinds of special chemicals.

Some or almost all liquids are either acids or bases to some degree.

Acids taste sour while bases taste bitter.

 

LESSON 3 – REVISION AND WEEK LESSON ASSESSMENT 

As stated in performance objectives or lesson evaluation. 

 

Alternative Plan Lesson Note on Acids and Bases – Acids and Bases – Meaning (Types) of Acid and Base and Uses of Acid and Base (Primary 5) ASEI PDSI METHOD

 

PRESENTATION

To deliver the lesson, the teacher adopts the following steps:

1. To introduce the lesson, the teacher revises the previous lesson. Based on this, he/she asks the pupils some questions;

2. Provides materials needed for the lesson (Lemon, wood ash, water, red and blue litmus paper).

3. Demonstrates physical properties of acids and bases by:

  • using blue litmus paper on lemon which will turn it red.
  • using red litmus paper on mixture of wood ash in water which will turn it blue.

4. Give s names of acids and bases.

5. Guides the pupils to taste lemon and dissolve ash in water and report their observation.

Pupil’s Activities – Carry out teacher directed activities on:

  • Lemon (acid).
  • Mixture of wood ash and water (base).
  • Use of red and blue litmus papers.

7. Teacher’s/Pupil’s Activities – Take safety precautions.

 

CONCLUSION

  • To conclude the lesson for the week, the teacher revises the entire lesson and links it to the following week’s lesson.
  • Next Lesson –

 

 

LESSON EVALUATION 

Pupils to:

1. explain the meaning of acid and base.

2. give three examples each of acids and bases.

3. state physical properties of acids and bases.

 

 

4. distinguish between acids and bases using litmus papers, etc.

5. list two uses of acids and bases.

6. state two types each of acids and bases.

 

 

WEEKLY ASSESSMENT 

ATTEMPT ALL THE QUESTIONS 

 

1. ________________ are two kinds of special chemicals.

A. Ripe and unripe fruits

B. Ash and water

C. Acids and Bases

 

2.Some or almost all liquids are either ________________ to some degree.

A. Acids

B. Bases

C. Acids or Bases

 

3. ________________ is used for testing acids.

A. Red litmus paper

B. Red and blue litmus paper

C. Blue litmus paper

 

4. ________________ is used for testing bases.

A. Red litmus paper

B. Red and blue litmus paper

C. Blue litmus paper

 

5. ________________ are chemical substances in almost liquid, commonly in unripe fruit.

A. Acids

B. Bases

C. Acids or Bases

 

6. ________________ are chemical substances opposite to acids.

A. Acids

B. Bases

C. Acids or Bases

 

7. When testing acids, blue litmus paper turns ________________.

A. Blue

B. Red

C. Green

 

8. When testing bases, blue litmus paper turns ________________.

A. Blue

B. Red

C. Green

 

9. Acids taste ________________ while based taste ________________.

A. Sour/sweet

 

 

B. Bitter/sweet

C. Sour/bitter

 

10. State one use of acid and base.

Acid is used for ________________________________

Base is used for ________________________________

 

 

 

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