Pearson Edexcel IAL Chemistry AS 1.6 Empirical & molecular formulae
Pearson Edexcel IAL Chemistry AS 1.6 Empirical & molecular formulae
Practise deriving empirical and molecular formulae from percentage composition, combustion data, hydrates and molar-mass evidence.
How this is tested
- calculate mole ratios from masses or percentages to obtain an empirical formula
- use empirical formula mass and molar mass to deduce the molecular formula
- determine water of crystallisation from mass loss or percentage water data