Calculations for AS and A level Chemistry
Being confident in tackling different types of mole calculation is the foundation upon which much of A level chemistry stands
From the blog
Heterogeneous catalysis and catalytic converters
Catalysts are able to lower the activation enthalpy, Ea, for a reaction, increasing the number of successful collisions between reactants
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The chemistry of photochemical smog
Photochemical smog is a brownish haze caused by the action of the sun’s visible and ultraviolet radiation on the primary
The Greenhouse Effect
Global warming and the greenhouse effect are topics that everyone feels they know well enough (because you’ve done them to
Free radical substitution reactions
Alkanes are exceptionally boring and unreactive molecules chemically speaking but we can persuade them to react with halogens in the
Why do we need to blend petrol?
Petrol needs to be blended to have the right properties in terms of its volatility and to reduce its propensity
Fractional distillation and catalytic cracking explained
Crude oil is the raw material from which alkanes are extracted via the process of fractional distillation. There is nothing
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Structural isomerism
Structural isomers are molecules with the same molecular formula but a different arrangement of atoms … you need to recognise
How to name an alkane
I’ve tried to simplify the rules for naming alkanes in this video – I don’t think this requires notes so
Aromatic, aliphatic and alicyclic hydrocarbons
It’s always important to start at the beginning! There is so much terminology in organic chemistry, from the naming of
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Shapes of molecules and polyatomic ions
Working out the shape of a molecule or a bond angle always starts with a dot and cross diagram, even