Doc Brown's Chemistry - GCSE/IGCSE/GCE (basic A level) O Level  Online Chemical Calculations

14. INDEX of other GCSE and basic A level chemical calculations

 Spotted any careless error? EMAIL query ? comment or request a type of calculation not covered?

14. Other miscellaneous chemical calculations

14.1 Percentage purity of a chemical reaction product

14.1 % purity of a product and assay calculations

14.2a Percentage yield of the product of a reaction and why not 100% in reality

14.2a % reaction yield and theoretical yield calculations and why you can't actually get 100% yield in practice

14.2b The Atom economy of a chemical reaction

14.2b atom economy calculations

14.3 Dilution of solutions calculations - calculating dilutions - volumes involved etc.

14.3 dilution of solutions calculations

14.4 Water of crystallisation in a crystallised salt

14.4 water of crystallisation calculations

14.5 Calculation of quantities required for a chemical reaction

14.5 how much of a reactant is needed? calculation of quantities required, limiting reactant quantities

See also Chemical & Pharmaceutical Industry Economics & Sustainability, Life Cycle Assessment, Recycling

Above is typical periodic table used in GCSE science-chemistry specifications in doing chemical calculations, and I've 'usually' used these values in my exemplar calculations to cover most syllabuses

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OTHER CALCULATION PAGES

1. What is relative atomic mass?, relative isotopic mass and calculating relative atomic mass

2. Calculating relative formula/molecular mass of a compound or element molecule

3. Law of Conservation of Mass and simple reacting mass calculations

4. Composition by percentage mass of elements in a compound

5. Empirical formula and formula mass of a compound from reacting masses (easy start, not using moles)

6. Reacting mass ratio calculations of reactants and products from equations (NOT using moles) and brief mention of actual percent % yield and theoretical yield, atom economy and formula mass determination

   • Reacting masses, concentration of solution and volumetric titration calculations (NOT using moles)

7. Introducing moles: The connection between moles, mass and formula mass - the basis of reacting mole ratio calculations (relating reacting masses and formula mass)

8. Using moles to calculate empirical formula and deduce molecular formula of a compound/molecule (starting with reacting masses or % composition)

9. Moles and the molar volume of a gas, Avogadro's Law

10. Reacting gas volume ratios, Avogadro's Law and Gay-Lussac's Law (ratio of gaseous reactants-products)

11. Molarity, volumes and solution concentrations (and diagrams of apparatus)

12. How to do acid-alkali titration calculations, diagrams of apparatus, details of procedures

13. Electrolysis products calculations (negative cathode and positive anode products)

14. Other calculations e.g. % purity, % percentage & theoretical yield, dilution of solutions (and diagrams of apparatus), water of crystallisation, quantity of reactants required, atom economy (this page)

    • 14.1 % purity of a product 14.2a % reaction yield 14.2b atom economy 14.3 dilution of solutions

    • 14.4 water of crystallisation calculation  14.5 how much of a reactant is needed?

15. Energy transfers in physical/chemical changes, exothermic/endothermic reactions

16. Gas calculations involving PVT relationships, Boyle's and Charles Laws

17. Radioactivity & half-life calculations including dating materials

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