Lesson Notes By Weeks and Term v4 - SHS 2
EQUILIBRIA
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EQUILIBRIA
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Subject: Chemistry
Class: SHS 2
Term: 2nd Term
Week: 2
Grade code: 2.1.2.LI.4
Strand code: 1
Sub-strand code: 2
Content standard code: 2.1.2.CS.2
Indicator code: 2.1.2.LI.4
Theme: PHYSICAL CHEMISTRY
Subtheme: EQUILIBRIA
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This lesson introduces the concept of salts, a class of chemical compounds we encounter daily. While we often think of the common salt we use for cooking (sodium chloride), the world of salts is vast and vital. In Ghana, salts are crucial for preserving our food like *koobi* and *momoni*, for our health in Oral Rehydration Salts (ORS), and in agriculture as fertilizers for our cocoa and maize farms. Understanding salts helps us appreciate the chemistry happening all around us, from treating an insect bite to understanding how certain fertilisers work.
A. What is a Salt?
In chemistry, a salt is an ionic compound formed when the hydrogen ion (H⁺) of an acid is partially or completely replaced by a metallic ion (e.g., Na⁺, K⁺, Ca²⁺) or an ammonium ion (NH₄⁺).
The most common reaction that forms a salt is neutralization, where an acid reacts with a base.
General Equation: Acid + Base → Salt + Water