SHS3 Chemistry · Semester 1, Week 13
Equilibria
Lesson notes
Learning Objectives
Indicator: 3.1.2.LI.1 - Explain oxidation and reduction reactions and illustrate reactivity of metals experimentally.
By the end of the lesson, learners can:
- Define oxidation and reduction in terms of addition/removal of oxygen and hydrogen, electron transfer, and changes in oxidation number.
- Assign oxidation numbers to elements in atoms, ions and compounds, and use changes in oxidation number to identify which species is oxidised and which is reduced.
- Classify given chemical reactions (combination, decomposition, combustion, displacement, disproportionation, photosynthesis, respiration) as oxidation, reduction or redox using oxidation state analysis.
- Perform a laboratory experiment to compare the reactivity of copper, zinc, silver and iron, and record observations accurately.
- Deduce a reactivity series from experimental results and predict whether a given displacement reaction will occur.
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Sign in with phone numberCurriculum details
- Strand
- Physical Chemistry (Strand 1)
- Sub-strand
- Equilibria (1.2)
- Content standard
- 3.1.2.CS.4 - Demonstrate knowledge and understanding of redox and apply its principles to electrochemical cells as well as their importance in everyday life. 3.1.2.LO.1 Use the knowledge in pH to distinguish between solutions that are acidic, neutral or basic. 5 Gender Equality and Social Inclusion 6 Socio-Emotional Learning 3.1.2.LO.2 Use your knowledge and understanding of concepts in hydration and hydrolysis to determine the types of salts. 3.1.2.LO.3 Use the understanding of hydrolysis of salts to decide on suitable indicator as well as plot and interpret titration curves. 3.1.2.LO.4 Describe oxidation and reduction reactions and apply their principles to electrochemical cells as well as their importance in everyday life.
- Indicator
- 3.1.2.LI.1 - Explain oxidation and reduction reactions and illustrate reactivity of metals experimentally.
- 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. 99
Exemplars (from the NaCCA curriculum)
Talk for Learning: Through a class session, explain oxidation and reduction reactions in terms of: a. Addition and removal of Oxygen and Hydrogen b. Electron transfer c. Changes in oxidation number Collaborative Learning: Working in groups of three, apply changes in oxidation state to deduce whether each of the following reactions are oxidation or reduction reactions: a. Combination reaction b. Decomposition reaction c. Combustion reaction d. Displacement reaction e. Disproportionation reaction f. Photosynthesis g. Respiration Exploratory Learning: - In small mixed ability or mixed gender groups, design and perform an experiment to illustrate the reactivity of metals. - Analyse results from the experiment and deduce patterns of reactivity of metals. Teaching and Learning Materials: - * Test tubes in a rack * Strips of copper foil * Strips of zinc foil * * 0.1M potassium bromide - Strip of silver wire * * ICT tools Emery paper * * Calculator 0.5 M copper sulphate solution * 0.5 M zinc sulphate solution - * 0.1 M silver nitrate solution * 50 ml Burettes * 25 ml pipettes * 250 ml conical flasks * 100 ml beakers * White tiles - * Retort stands * solution - KMnO 4 * * 0.02M potassium Iron (II) solution * manganate (VII) Iodine solution * Potassium iodide * Na S O 2 2 3 * Starch * * Electrolysis cell Test tubes * Test tube rack - * Copper powder * Zinc powder * * Clamps and stands Bromine water * * Cover slides 0.1 M potassium iodide solution * 0.1 M potassium chloride solution - * 0.1 M Iron (III) chloride - * Power pack - * Connecting wires and clips - * Wooden splint * Droppers * 1 M tetraoxosulphate (VI) acid * 1 M sodium chloride solution - * 1 M copper(II) chloride * Identical fresh nails * Test tube in test tube racks * Stoppers * Spatula * PH sensor * Temperature sensor * Stands and clamps - * Calcium chloride * Oil * Iron coated with zinc * Iron coated with tin * Iron filings * Salt Assessment (3.1.2.AS.1). The document marks these depth-of-knowledge levels for this indicator: Level 3 Strategic reasoning.