Students should be able to:
1.2a determine the empirical formula of a compound from reacting mass data and hence the molecular formula
1.2b write full and ionic equations
1.2c use chemical equations to deduce reacting masses and vice versa
1.2d define the Avogadro constant and understand the concept of amount of substance
1.2e use solution concentration data expressed in g dm-3 and mol dm-3 to include volumetric analysis
• in Unit 1 students will not be expected to recall equations for titration calculations
1.2f perform simple volumetric calculations (paper 3B only)
1.2g understand the concept of the molar volume of a gas and apply this to simple calculations
1.2h deduce reacting gas volumes from chemical equations.
• students will not be expected to convert gas volumes for changes in temperature and
pressure