← Chemistry
Topic 3: Stoichiometry
8 subtopics · Formulae, moles, reacting masses and gas volumes
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3.1
Formulae
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Word equations, balanced symbol equations, state symbols, ionic compound formulae, molecular and empirical formulae
3.2
Relative Masses of Atoms and Molecules
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Relative atomic mass (Aᵣ), relative molecular mass (Mᵣ), calculating from isotopic abundances
3.3
The Mole and the Avogadro Constant
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Mole concept, Avogadro constant (6.02 × 10²³), molar mass, mole calculations
3.4
Chemical Equations
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Balancing equations, state symbols, ionic equations, spectator ions
3.5
Reacting Masses
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Stoichiometric calculations, mole ratios, percentage by mass, limiting reagent
3.6
Percentage Yield and Purity
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Calculating percentage yield and percentage purity, reasons for yield below 100%
3.7
Concentration and Volume of Solutions
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Concentration in g/dm³ and mol/dm³, dilution, titration calculations
3.8
Gas Volumes
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Molar volume at RTP (24 dm³/mol), gas volume calculations from equations