Materials · JHS3 Science

Lesson notes

Learning Objectives

Indicator: B9.1.1.1.3 - Describe the characteristics of common acids, bases and salts.

By the end of the lesson, learners can:

Identify common acids, bases and salts by their observable characteristics such as taste, touch, reaction with indicators, and reaction with other substances.
Describe the characteristic properties of acids, including their sour taste, corrosive nature, and ability to turn blue litmus paper red.
Describe the characteristic properties of bases, including their bitter taste, slippery feel, and ability to turn red litmus paper blue.
Describe the characteristic properties of salts, including their formation from acid-base reactions and their neutral effect on litmus paper.
Construct a simple pH scale model using local materials and use it to classify common household substances as acidic, basic or neutral.

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Curriculum details

Strand: Diversity of Matter (Strand 1)
Sub-strand: Materials (1.1)
Content standard: B9.1.1.1 - Show an understanding of formation of binary chemical compounds and their uses (Acids, Bases and Salts)
Indicator: B9.1.1.1.3 - Describe the characteristics of common acids, bases and salts.
Suggested placement: Term 1, Week 2 (Week 2 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: Science, Common Core Programme (JHS1-JHS3), 2023, p. 88
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

1. Identify acids, bases and salts by their characteristics.
2. Create a model of a pH Scale and use it to determine the strength of common acids and alkali solutions using indicators.