16 2.1.4 (d) the techniques and Gridlocks concentrations * Adapt of indigestion tablets’ activity to cover A-Level ‘Neutralisation procedures used when preparing appropriate technique for titration, and to include making up standard Could be used to review concentration a standard solution of required solution to cover all requirements for PAG2. calculations before starting carrying out concentration and carrying out titrations and subsequent titration * Introduce activity, pointing out the reasons for using titrations (e.g. acid–base titrations calculations. high level of accuracy). Discuss uncertainties for each piece of 2.1.4 (e) structured and apparatus involved. titration calculations, * Provide calculation steps and calculation grid resources to support Worksheet: based on experimental results of calculations. Set as homework if not completed in class, along with Answer familiar and non-familiar acids relevant questions from textbook and planning question from practical and bases activity. PAG 2: Acid–base titration Neutralisation of indigestion tablets Titration practical where the concentration of alkali in an indigestion tablet is found by titrating against hydrochloric acid. Activity: Titration calculation steps Step-by-step guide to titration calculations. Titration calculation grid Grid method for titration calculations.
16 2.1.4 (d) the techniques and procedures used when preparing a standard solution of required concentration and carrying out acid–base titrations 2.1.4 (e) structured and titration calculations, based on experimental results of familiar and non-familiar acids and bases PAG 2: Acid–base titration Gridlocks concentrations Could be used to review concentration calculations before starting carrying out titrations and subsequent titration calculations. Worksheet: Answer Neutralisation of indigestion tablets Titration practical where the concentration of alkali in an indigestion tablet is found by titrating against hydrochloric acid. Activity: Titration calculation steps Step-by-step guide to titration calculations. Titration calculation grid Grid method for titration calculations. * Adapt ‘Neutralisation of indigestion tablets’ activity to cover A-Level appropriate technique for titration, and to include making up standard solution to cover all requirements for PAG2. * Introduce activity, pointing out the reasons for using titrations (e.g. high level of accuracy). Discuss uncertainties for each piece of apparatus involved. * Provide calculation steps and calculation grid resources to support calculations. Set as homework if not completed in class, along with relevant questions from textbook and planning question from practical activity.