Student Details
Syllabus Objectives Covered
- Write and interpret chemical formulae for elements, compounds and ions.
- Construct, balance and interpret word equations and symbolic chemical equations.
- Use state symbols: (s), (l), (g) and (aq).
- Calculate relative molecular mass and relative formula mass from relative atomic masses.
- Use the mole concept and Avogadro constant in chemical calculations.
- Calculate moles from mass, concentration and gas volume where appropriate.
- Use balanced equations to calculate reacting masses and product masses.
- Identify limiting reactants in simple reactions.
- Calculate empirical formulae and molecular formulae.
- Calculate percentage composition, percentage yield and percentage purity.
Formula Toolkit
Relative formula mass
Mr = sum of relative atomic masses
Mr = sum of relative atomic masses
Moles from mass
moles = mass ÷ Mr
moles = mass ÷ Mr
Mass from moles
mass = moles × Mr
mass = moles × Mr
Concentration
moles = concentration × volume in dm³
moles = concentration × volume in dm³
Percentage yield
% yield = actual yield ÷ theoretical yield × 100
% yield = actual yield ÷ theoretical yield × 100
Percentage purity
% purity = mass of pure substance ÷ mass of impure sample × 100
% purity = mass of pure substance ÷ mass of impure sample × 100
Embedded Video Learning Stations
1. Relative formula mass
2. Moles and reacting masses
3. Mole calculations practice
4. Concentration and volume
5. Empirical formula
6. Percentage yield and purity
Videos are embedded using real YouTube embed links. Teachers may preview availability before publishing to students.
Guided Notes
30-Mark Manual Practice
Answer all parts. Your responses will be sent to the backend sheet for manual marking by your teacher. Show working clearly.