Lesson Notes By Weeks and Term - Senior Secondary 2

Qualitative and quantitative analysis 1

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TERM׃ 3RD TERM

WEEK EIGHT

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 5 periods each

Date:

Subject: Chemistry

Topic:- Qualitative and quantitative analysis 1

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

  1. Define acid base titration.
  2. Carry out Redox titration involving KMnO4, Fe²+, I2 and Sulphuric acid.

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 define and explain acid base titration

Students pay

attention

STEP 2

EXPLANATION

Teacher aid students to carry Redox titration of some common compounds like KMNO4

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 AND QUANTITATIVE ANALYSIS 1

Acid base Titration

Acid-base titrations involve the neutralization of an acid by a base (or vice versa) and are commonly used to determine the concentration of one of the reactants. Here are two examples of acid-base titrations:

    - Application: This titration is commonly used to determine the concentration of acetic acid in vinegar.

In both examples, the stoichiometry of the reaction allows for the determination of the unknown concentration by measuring the volume of the titrant (the solution of known concentration) required to reach the equivalence point. The choice of indicator depends on the pH range of the equivalence point of the specific acid-base system being analyzed.

Summary of redox titrations involving potassium permanganate (KMnO4), ferrous ion (Fe2+), oxalate ion (C2O42+), iodine (I2), potassium iodide (KI), and thiosulfate ion (S2O32+):       

These titrations involve the transfer of electrons, and the choice of indicators is crucial for detecting the endpoint accurately. Keep in mind that the actual conditions and concentrations may vary based on the specific experiment.

EVALUATION:   1. What is acid base titration

  1. Give two examples of acid base titration.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively