Lesson Notes By Weeks and Term v4 - SHS 1

SCIENCE AND MATERIALS IN NATURE

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Subject: General Science

Class: SHS 1

Term: 1st Term

Week: 9

Grade code: 2.1.1.LI.2

Strand code: 1

Sub-strand code: 1

Content standard code: 2.1.1.CS.1

Indicator code: 2.1.1.LI.2

Theme: EXPLORING MATERIALS

Subtheme: SCIENCE AND MATERIALS IN NATURE

Lesson Video

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Performance objectives

Lesson summary

This lesson explores the fascinating chemical reaction between acids and bases to form salts. While many of us think of 'salt' as just the white crystals we add to our food (table salt), in chemistry, 'salt' refers to a very large and important family of compounds. From the salt used to preserve `koobi` and `momoni`, to the compounds in farmers' fertilizers and the active ingredients in antacids that soothe an upset stomach, salts are all around us. Understanding how they are formed from acids and bases gives us the power to understand many processes in our homes, in industry, and in the environment.

Lesson notes

This section contains the core content for the lesson. It should be delivered using a mix of direct instruction, questioning, and board work. A. What is a Salt in Chemistry?

First, let's correct a common misconception. The salt we use for cooking, sodium chloride (NaCl), is just *one example* of a salt.

Definition: A salt is an ionic compound formed when the hydrogen ion (H⁺) of an acid is partially or completely replaced by a metal ion (like Na⁺, K⁺, Ca²⁺) or an ammonium ion (NH₄⁺).

The most common way salts are formed is through a reaction called neutralization. B. The Neutralization Reaction

Evaluation guide