Students: 2. The meaning of pH calculate pH, pOH, hydrogen ion concentration ([H+]) and hydroxide ion Teacher demonstration showing the effect of dilution on pH of a strong acid, such as concentration ([OH–]) for a range of solutions HCl. Use a data logger to record the pH of 0.1M, 0.01M, 0.001M and 0.0001M HCl, to (ACSCH102) demonstrate that a ten-fold change in concentration corresponds to a change of one pH unit. Discuss the self-ionisation of water, reviewing the equilibrium constant Kw Students process information to calculate pH, pOH, hydrogen ion concentration ([H+]) and hydroxide ion concentration ([OH–]) for a range of solutions, using the following: pH = -log[H+] pOH = -log[OH-] Calculating pH, pOH, pH + pOH = 14 [H+], [H3O+], [OH-] of Ensure that students are familiar with the use of calculators and digital Acids and Bases technologies and consider significant figures in presenting final answers. View the Students: 3. Strong and weak acids conduct an investigation to demonstrate the use of pH to indicate the differences between Students plan an investigation to measure the pH of identical concentrations of strong the strength of acids and bases (ACSCH102) and weak acids. W/S Questioning and Predicting CH11/12-1 – – W/S Planning Investigations CH11/12-2 – – W/S Conducting Investigations CH11/12-3 – – W/S Analysing Data and Information CH11/12-5 – – Students describe the difference between a strong and weak acid in terms of an equilibrium between the intact model and its ions. Students analyse the pH of equimolar solutions of a variety of common acids and identify common acids as strong or weak according to the equilibrium model. Students: Students use diagrams, ionic equations and molecular model kits to explain the terms construct models and/or animations to and as applied to acids and communicate the differences between strong, ‘ionisation’, ‘strong’, ‘weak’, ‘concentrated’ ‘dissociation’ bases. weak, concentrated and dilute acids and Students identify conjugate acid-base for a variety of strong and weak acids. bases (ACSCH099) Students: 4. Amphiprotism
Students: calculate pH, pOH, hydrogen ion concentration ([H+]) and hydroxide ion concentration ([OH–]) for a range of solutions (ACSCH102) 2. The meaning of pH Teacher demonstration showing the effect of dilution on pH of a strong acid, such as HCl. Use a data logger to record the pH of 0.1M, 0.01M, 0.001M and 0.0001M HCl, to demonstrate that a ten-fold change in concentration corresponds to a change of one pH unit. Discuss the self-ionisation of water, reviewing the equilibrium constant Kw Students process information to calculate pH, pOH, hydrogen ion concentration ([H+]) and hydroxide ion concentration ([OH–]) for a range of solutions, using the following: pH = -log[H+] pOH = -log[OH-] pH + pOH = 14 Calculating pH, pOH, [H+], [H3O+], [OH-] of Acids and Bases Ensure that students are familiar with the use of calculators and digital technologies and consider significant figures in presenting final answers. View the Students: conduct an investigation to demonstrate the use of pH to indicate the differences between the strength of acids and bases (ACSCH102) 3. Strong and weak acids Students plan an investigation to measure the pH of identical concentrations of strong and weak acids. W/S – Questioning and Predicting – CH11/12-1 W/S – Planning Investigations – CH11/12-2 W/S – Conducting Investigations – CH11/12-3 W/S – Analysing Data and Information – CH11/12-5 Students describe the difference between a strong and weak acid in terms of an equilibrium between the intact model and its ions. Students analyse the pH of equimolar solutions of a variety of common acids and identify common acids as strong or weak according to the equilibrium model. Students: construct models and/or animations to communicate the differences between strong, weak, concentrated and dilute acids and bases (ACSCH099) Students use diagrams, ionic equations and molecular model kits to explain the terms ‘ionisation’, ‘strong’, ‘weak’, ‘concentrated’ and ‘dissociation’ as applied to acids and bases. Students identify conjugate acid-base for a variety of strong and weak acids. Students: 4. Amphiprotism
chemistry-stage-6-year_12-sample-unit-module-6-acids-bases.docx