Chemistry WCH11/01 October 2021

Edexcel International AS/A Level Chemistry (WCH) Oct 2021

معلم موافق رایگان بودن است.

1. Periodic trends and ionisation energy patterns across Period 3 elements, interpretation of ionisation energy graphs, comparison of aluminium and magnesium first ionisation energies

2. Structure, bonding, and electron configurations of BeCl₂ and CaCl₂ in gaseous and solid states, dot-and-cross diagrams, polymeric structure interpretation, bond angle predictions using electron-pair repulsion theory

3. Calculation of empirical formula from elemental mass data for calcium silicate, application of pV = nRT for CO₂ volume, interpretation of silicon mass spectra and isotopic abundance

4. Giant covalent lattice structure of SiO₂, properties as electrical insulator and heat-resistant material, bonding in Al metal, suitability for overhead cables, hydrogen production from aluminium and environmental implications

5. Reactions and isomerism of alkenes, identification and drawing of alkene skeletal/displayed formulae, reactions of but-1-ene with halogens, acids, hydrogenation, and oxidation, polymer formation and displayed structure of poly(but-1-ene)

6. Incineration of polymers: advantage/disadvantage beyond climate impact, complete combustion of butane with gas volume calculation, safety hazards of butane use in enclosed spaces