From masses to moles to balanced equations (HT GCSE Chemistry AQA)

After this lesson, students should be able to write and balance an equation being given the masses of reactants and products.

The starter questions review working out the number of moles of a substance in its mass. The key definitions such as, relative atomic mass, Ar; relative molecular mass, Mr; relative formula mass, Mr; and molar mass, M are revisited.

The method in calculating the balancing numbers in a balanced equations from masses of reactants and products is outlined in steps (the masses of reactants and products in grams converted to–> amounts in moles converted to --> simplest whole number ratio) before moving to a workout example.

Subsequently, students apply the method to complete questions and check / assess their learning and understanding.
Teacher PP supports the workbook; it contains the answers (revealed in steps) to all activities.