June 2017 - MrKhemistry
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Monthly Archives: June 2017

Simple tips for pattern recognition questions

Tips for pattern recognition questions Tip #1: Use your highlighter. Complicated rearrangement of atoms can be followed simply by highlighting the example given. Do the same for the question you are given and you will be able to predict the reaction product easily! Tip #2: Number the carbon chain. This tip is more for those questions […]

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Changes to H2 Chemistry Syllabus Part 2

H2 Chemistry Syllabus 2017 Part 2 (part 1 here) H2 chemistry syllabus 2017 updates: Organic: Constitutional (structural) isomerism. Cis-trans isomerism, used to be geometric isomerism. Enantiomerism used to be optical isomerism. Nitrogen Compounds (proteins): Not required to learn primary – quaternary structures, as well as list major functions of proteins in the body. Not required […]

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Changes in H2 Chemistry syllabus 2017 – part 1

Theories of acids and bases *New! Arrhenius theory – acid produce H+ in water, base produces OH– in water. Bronsted Lowry theory – acid produces H+, base accepts H+. Conjugate pair concept. Lewis theory – acid as electron pair acceptor, base as electron pair donor. Gases: Vm = 22.7 dm3 at stp (1 bar, 273 […]

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Changes in weightage for H2 Chemistry syllabus 2017

‘A’ Level Chemistry Syllabus Overview of changes in weightage: Table taken from SEAB website All students required to take practical paper 4, including private candidates. This means that candidates retaking their A level chemistry paper this year will have to sit for a 20% weightage practical paper. Also, their previous SPA scores will not be counted. […]

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