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soluble salt preparation from insoluble base-acid neutralisationDoc Brown's Chemistry - GCSE/IGCSE/GCE (basic A level) O Level  Online Chemical Calculations

study examples carefully14. Other GCSE chemical calculationsstudy examples carefully

 Help for problem solving in doing % purity calculations, atom economy calculations, % yield calculations, dilution calculations, water of crystallisation calculations, predicting quantities of reactants needed to make a given quantity of product. Practice revision questions on *, using experiment data, making predictions. The methods of how to calculate % purity?, how do you calculate % yield? are all explained with worked out examples, What is the 'atom economy' of a chemical reaction?, How do you calculate atom economy?, How do you do solution dilution calculations, what method is use to measure water of crystallisation?, how to you calculate water of crystallisation in a salt?, How do you theoretically calculate quantities of chemicals required for a chemical reaction from its symbol equation? Read on .... !

On-line Quantitative Chemistry Calculations

Online practice exam chemistry CALCULATIONS and solved problems for KS4 Science GCSE/IGCSE CHEMISTRY and basic starter chemical calculations for A level AS/A2/IB courses * EMAIL query?comment or request for type of GCSE/IGCSE/AS calculation?

study examples carefully14. Other GCSE miscellaneous chemical calculationsstudy examples carefully

 

14.1 Percentage purity of a chemical reaction product

14.1 % purity of a product (now on separate page)

 

14.2a Percentage yield of the product of a reaction

14.2a % reaction yield (now on separate page)

 

14.2b The Atom economy of a chemical reaction

14.2b atom economy (now on separate page)

 

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

14.3 dilution of solutions (now on separate page)

 

14.4 Water of crystallisation in a crystallised salt

14.4 water of crystallisation calculation (now on separate page)

 

14.5 Calculation of quantities required for a chemical reaction, % yield and atom economy

14.5 how much of a reactant is needed? (now on separate page)

 

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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

  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)

  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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