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
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
Continue readingAromatic, aliphatic and alicyclic hydrocarbons
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
What is intermolecular bonding?
Understanding the different types of intermolecular bond is usually straight forward. Describing them in writing is not 😳. All intermolecular
Electronegativity and polar bonds
Electronegativity is the power of an atom in a molecule to attract electrons toward itself – we are typically talking
Giant covalent (macromolecular) networks and simple molecules
More good news! The properties of diamond and graphite and silicon dioxide have’t changed! On a more serious note though,
Continue readingGiant covalent (macromolecular) networks and simple molecules
Molecular orbital theory
This is the second modern theory of bonding, the first being valence bond theory. In molecular orbital theory covalent bonds