formulae and equations 2.1.3 Amount of 10 hours Experiments requiring measurement of Data sheet value for the molar gas volume at room temperature substance mass and volume (liquids, solutions and pressure = 24.0 dm3 mol–1. Ideal gas equation should be and gases) and calculations related to used if specific temperature and pressure are provided. amount of substance. E.g. SI unit for pressure is Pa (pressures may be given in kPa). It is determination of Ar of a metal recommended that candidates are also familiar with atm. determination of empirical formula determination of of crystallisation. PAG1 2.1.4 Acids 6 Neutralisation reactions as described Non-structured titration calculations are required. in the specification. Preparation of a standard solution. Acid–base titrations. PAG2 2.1.5 Redox 4 hours reactions of metals with acids to Candidates will be expected to know oxidation numbers of O in form salts. peroxides and H in metal hydrides. Other redox reactions, e.g. Ionic equations for redox reactions of metals with acids are not displacement reactions. required. 2.2.1 Electron 3 hours Electron configurations of Cu and Cr are not assessed at AS Level. structure Shapes of s and p orbitals must be noted.
formulae and equations 2.1.3 Amount of substance 10 hours Experiments requiring measurement of mass and volume (liquids, solutions and gases) and calculations related to amount of substance. E.g. determination of Ar of a metal determination of empirical formula determination of of crystallisation. PAG1 Data sheet value for the molar gas volume at room temperature and pressure = 24.0 dm3 mol–1. Ideal gas equation should be used if specific temperature and pressure are provided. SI unit for pressure is Pa (pressures may be given in kPa). It is recommended that candidates are also familiar with atm. 2.1.4 Acids 6 Neutralisation reactions as described in the specification. Preparation of a standard solution. Acid–base titrations. PAG2 Non-structured titration calculations are required. 2.1.5 Redox 4 hours reactions of metals with acids to form salts. Other redox reactions, e.g. displacement reactions. Candidates will be expected to know oxidation numbers of O in peroxides and H in metal hydrides. Ionic equations for redox reactions of metals with acids are not required. 2.2.1 Electron structure 3 hours Electron configurations of Cu and Cr are not assessed at AS Level. Shapes of s and p orbitals must be noted.
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