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KS4 and KS5 resources for CIE,EDEXCEL and AQA

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Notes from a post graduate teacher and lecturer with 33 year teaching experience in science in UK based examinations .

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Notes from a post graduate teacher and lecturer with 33 year teaching experience in science in UK based examinations .
Stoichiometry and mole calculations for Edexcel GCSE( 9-1) students
Liyanage1963Liyanage1963

Stoichiometry and mole calculations for Edexcel GCSE( 9-1) students

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This booklet covers the following topics 1 . writing Formulae , word equation, symbol equation and ionic equations 2.Calculating relative formula mass(molar mass) and percentage by mass 3.Calculating moles, molecules , atoms and mass of chemical compound 4.Calculating the moles and volume of gases 5.Calculating the concentration , moles and volume of solutions 6. Calculating the moles, molecules and atoms ( calculations with Avogadro Constant) 7.Calculating empirical formula and molecular formula. 8. Percentage purity and percentage yield 9. Calculating of reacting masses , excess and limiting reagents and prediction of the quantity of reactants and masses 10.Calculations problems related with titrations 11. Atom economy 12. Answers
EDEXCEL IAL - Unit 4- Organic chemistry -The Carbonyl compounds, Carboxylic acids and Chirality
Liyanage1963Liyanage1963

EDEXCEL IAL - Unit 4- Organic chemistry -The Carbonyl compounds, Carboxylic acids and Chirality

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The complete revision notes of the further organic chemistry of unit 4 cover the following topics in according to the new IAL specification. • Isomerism ( introduction only) • Optical isomerism • Chirality and enantiomers • Optical activity and reaction mechanisms • Carbonyl compounds ( aldehydes and ketones) • Preparations and reactions of carbonyl compounds. • Redox reactions of carbonyl compounds • Nucleophilic addition reactions of carbonyl compounds • Carboxylic acids • Preparations and reactions of carboxylic acids • Carboxylic acid derivatives – acyl chlorides, esters and polyesters • Polymerisation