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CALCULATIONS IN CHEMISTRY

Doc Brown's Chemistry KS4 science O Level GCSE/IGCSE/GCE-AS Revision Notes

CHEMICAL CALCULATIONS PAGES INDEX

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 * F/H (foundation/higher) represent easier/harder UK KS4 GCSE/IGCSE/KS4 science-chemistry courses * There are 16 linked sections listed below * EMAIL query?comment e.g. spotted a silly error or request for type of GCSE calculation I don't seem to have covered? In sections 1-16 you can study definitions of the terms used and examples of how to do chemical calculations. Sections 2 to 6 illustrate the basic 'calculation' requirements for most UK GCSE Science students. Sections 1, and 7 to 15 cover most extra material for higher GCSE student in Science, triple award or IGCSE Chemistry.

Requested calculations to add: more calculating mass required in salt preparations given volume and concentration of acid e.g. starting with a volume of acid of known concentration.

Just click on the Ncyan.gifcalc4.GIFicons for notes and examples of a particular type of calculation to revise from.

To self-test yourself for revision

click on the icon click me! for a type in answer quiz,

or click me! for a multiple choice quiz of 5Q's selected at random from the database

There are two larger combined quizzes for foundation (F) or higher (H) GCSE/IGCSE students.

F/H suggests general foundation/higher revising guidelines for GCSE level i.e. F+H = some easy and some hard!

Please note the Quiz feedback either relates directly to the Q [???-xx] OR it may be a typical worked example.

 Links to NOTES and EXAMPLES of types of chemical calculations

 QUIZZES available (mc = multiple choice, sa = type in short answer)

(c) doc bclick me!1. What is relative atomic mass? (Ar)

See also Mass Spectrometer for advanced students) and relative isotopic mass

1. click me!Honly or (c) doc bHonly

(c) doc bclick me!2. Calculating relative formula/molecular mass (Mr) of a compound or element molecule

2. click me!F+H or (c) doc bF+H

.(c) doc bclick me!3. Law of Conservation of Mass experiment and simple reacting mass calculations

3. click me!F+H or (c) doc bF+H

(c) doc bclick me!4. Composition by percentage (%) mass of elements in a compound

4. click me!F+H or (c) doc bF+H

(c) doc bclick me!5. Empirical formula and formula mass of a compound from reacting masses (easy start, NOT using moles)

5.click me!F+H or (c) doc bF+H

c) doc bclick me!6a. Reacting mass ratio calculations of reactants and products and brief mention of actual percent % yield and theoretical yield, atom economy and formula mass determination (NOT using moles)

c) doc b click me!6b. Reacting masses, concentration of solution and volumetric titration calculations (NOT using moles)

6a.click me!F+H or (c) doc bF+H

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

Also extra more advanced Q's for Advanced Chemistry Students using the Avogadro Constant and with answers provided

7.click me!Honly or (c) doc bHonly

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

8.click me!Honly or (c) doc bHonly

(c) doc bclick me!9. Moles and the molar volume of a gas, Avogadro's Law

9.click me!Honly or (c) doc bHonly

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

10.click me!Honly or (c) doc bHonly

(c) doc bclick me!11. Molarity, volumes and solution concentrations (and diagrams of apparatus)

11.click me!Honly or (c) doc bHonly

(c) doc bclick me!12. Volumetric titration calculations e.g. acid-alkali titrations (and diagrams of apparatus and descriptions of procedures)

See also Advanced level acid-base titration calculation questions

and Advanced level REDOX titration calculation questions

12.click me!Honly or (c) doc bHonly

(c) doc bclick me!13. Electrolysis products calculations (negative cathode and positive anode products)

13.click me!Honly or (c) doc bH only

(c) doc bclick me!14. Other calculations e.g. % purity, % percentage & theoretical yield, atom economy, volumetric titration apparatus, dilution of solutions (and diagrams of apparatus), water of crystallisation, quantity of reactants required

14. No Quiz written yet

(c) doc bclick me!15. Energy transfers in physical/chemical changes, activation energies and reaction profiles etc. (notes on a separate web page)

(c) doc bclick me!More enthalpy calculations explained for Advanced Level

15.(c) doc bF+H or (c) doc bHonly

Advanced Enthalpy Calculations with worked out answers

(c) doc b 16. Gas calculations involving PVT relationship and determining molecular mass of a volatile liquid are on the more advanced States of Matter - Gas Laws page

only examples in notes

(c) doc bclick me!Radioactivity & half-life calculations including dating materials

 
Advanced Level Calculations (GCE-AS-A2-IB-US grades 11-12, AP)

Ideal gas law P-V-T calculations

Acid-base and other non-redox titration questions

Redox volumetric titration questions

molecular equilibrium problem solving

partition and solubility product calculations

pH-pKa/b acid-base Q's and buffer calculations

Relative atomic mass calculations and Mass Spectrometer

All advanced level questions have worked out answers included.

topCombined 'bumper' on-line Chemical Calculations Quizzes for KS4-GCSE-IGCSE

 The download may be slow without broadband

click me!click me! Basic GCSE/IGCSE Foundation Quiz on Ex. 2. to 6. (NO moles!)  (multiple choice)

click me!(c) doc b More advanced GCSE/IGCSE Higher Quiz/GCE-AS(basic) on Ex. 1. to 13. (lots of moles!)

click me!click me! Basic GCSE/IGCSE Foundation Quiz on Ex. 2. to 6. (NO moles!)  (type in answer)

click me!(c) doc b More advanced GCSE/IGCSE Higher Quiz/AS(basic) on Ex. 1. to 13. (lots of moles!)

chemical calculations in chemistry Revision KS4 Science chemical calculations in chemistry Additional Science Triple Award Science Separate Sciences Courses aid to chemical calculations in chemistry textbook revision GCSE/IGCSE/O level Chemistry chemical calculations in chemistry Information Study Notes for revising for AQA GCSE Science chemical calculations in chemistry, Edexcel GCSE Science/IGCSE Chemistry chemical calculations in chemistry & OCR 21st Century Science, OCR Gateway Science chemical calculations in chemistry  WJEC gcse science chemistry Chemical calculations in chemistry CEA/CEA gcse science chemistry O Level Chemistry (revise courses equal to US grade 8, grade 9 grade 10 chemical calculations in chemistry) A level Revision notes for GCE Advanced Subsidiary Level chemical calculations in chemistry AS Advanced Level A2 IB Revising chemical calculations in chemistry AQA GCE Chemistry OCR GCE Chemistry chemical calculations in chemistry Edexcel GCE Chemistry Salters Chemistry chemical calculations in chemistry CIE Chemistry chemical calculations in chemistry, WJEC GCE AS A2 Chemistry chemical calculations in chemistry, CCEA/CEA GCE AS A2 Chemistry revising chemical calculations in chemistry courses for pre-university students (equal to US grade 11 and grade 12 and AP Honours/honors level chemical calculations in chemistry revision guides


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