Matter and Its Properties · SHS1 Chemistry

Lesson notes

Learning Objectives

Indicator: 1.1.1.LI.3 - Describe the mole as a unit of amount of substance.

By the end of the lesson, learners can:

Define the mole as the SI unit for measuring the amount of a substance, equal to 6.02 × 10²³ elementary entities.
State Avogadro’s constant as 6.02 × 10²³ particles per mole and explain its relationship to the mole.
Identify the different elementary entities (atoms, ions, molecules, electrons, protons, neutrons) that the mole can be used to count.
Distinguish between the terms “amount of substance,” “mass,” and “number of particles” in simple quantitative contexts.
Perform basic calculations converting between number of particles and moles using Avogadro’s constant.

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Curriculum details

Strand: Physical Chemistry (Strand 1)
Sub-strand: Matter and Its Properties (1.1)
Content standard: 1.1.1.CS.2 - Demonstrate an understanding of the mole concept and its significance to the quantitative analysis of chemical reaction. 1.1.1.LO.1 Use the knowledge and understanding of the scientific practices in Chemistry to explain the structure of the atom as well as the stability of its nucleus. 1.1.1.LO.2 Use the mole concept to determine the amount and quantity of various substances involved in chemical reactions. 1.1.1.LO.3 Write mole ratios for chemical equations and apply it in quantitative analysis. 1.1.1.LO.4 Use the kinetic theory of matter to explain the behaviour of solids, liquids and gases under different conditions and describe the laboratory preparation of gases as well as their uses in everyday life.
Indicator: 1.1.1.LI.3 - Describe the mole as a unit of amount of substance.
Suggested placement: Semester 1, Week 13 (Week 13 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. 34

Exemplars (from the NaCCA curriculum)

Talk for Learning: Through a class activity:
- Explain the mole in relation to various elementary entities (atoms, ions, molecules, electrons, protons, neutrons).
- Discuss the relationship between the Mole and Avogadro's Constant.
Teaching and Learning Materials:
- * Worksheets with sample questions * Worksheets to record results. * Na CO 2 3 * CaCl 2 * Bolt and nuts * Resources for measuring volume and preparing solutions * Weighing scale
- * Calculator
- * Periodic table containing the elements with their relative atomic masses * Calculator * Beam balance or diagram of beam balance Substances of different weights
- * Apparatus (beaker, flask, weighing * Worksheet on the of substance and molar * Solid solutes
- Liquid solutes (e.g., water)
- CHARTS * Charts between other quantities
- for preparing solutions funnel, stirrer, volumetric scale), with sample questions interconversion of amount to number of entities quantities. (e.g., NaOH, NaCl) (e.g., HCl) Solvent
- showing interconversion amount of substance and
Assessment (1.1.1.AS.3). The document marks these depth-of-knowledge levels for this indicator: Level 1 Recall.