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
Author: Sarah Parkes
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
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,
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Molecular orbital theory
This is the second modern theory of bonding, the first being valence bond theory. In molecular orbital theory covalent bonds