Science and Materials in… · SHS2 General Science

Lesson notes

Learning Objectives

Indicator: 2.1.1.LI.1 - Differentiate among acids, bases and water.

By the end of the lesson, learners can:

State the defining properties of acids, bases and water based on taste, touch and reaction with indicators.
Classify common household and laboratory liquids as acidic, basic or neutral using litmus paper.
Conduct a simple group experiment to test the pH of given liquids, recording observations accurately in a table.
Explain, in their own words, the differences between acids, bases and water using at least two characteristic tests.
Justify why water is described as neutral while acids and bases have opposing properties, using evidence from their observations.

Sign in with your phone number to read the full note and download the GES plan - free.

Sign in with phone number

Curriculum details

Strand: Exploring Materials (Strand 1)
Sub-strand: Science and Materials in Nature (1.1)
Content standard: 2.1.1.CS.1 - Demonstrate understanding of liquids in the Lives of humans. 2.1.1.LO.1 Describe the nature and uses of different liquids in the Lives of humans.
Indicator: 2.1.1.LI.1 - Differentiate among acids, bases and water.
Suggested placement: Semester 1, Week 1 (Week 1 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: NaCCA curriculum document, p. 64

Exemplars (from the NaCCA curriculum)

Group/Collaborative Learning: Set up activities for different abilities and/or mix sex (where applicable) and supervise groups to perform experiments, observe and discuss the differences in acids, bases/alkalis, salts and water according to how they observe the activities individually and in groups.
Teaching and Learning Resources:
- Acid (HCl or any suitable one)
- base/Alkali (CaO, Na₂O/Ca(OH)₂,
- NaOH etc) reagents conical flasks
- white tiles
- 250ml beakers
- measuring cylinders
- weighing scale
- indicators
- 1-litre volumetric flasks
- alkali
- mineral acids
- pH scale
- stirrers
- pipettes
- distilled water
Assessment (2.1.1.AS.1). The document marks these depth-of-knowledge levels for this indicator: Level 3 Strategic reasoning.