Mychem

Notes, explanations and resources for KS3, GCSE and A level Students of chemistry

Subcategories from this category:

Atoms and bonding

Electrode potentials

Enter your text here ... Enter your text here ... ​Redox chemistry and equilibria
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chromatography

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Extending the Carbon Chain (OCR)

​Sometimes in organic synthesis there is a need to extend the length of a carbon chain . This can be achieved in a few different ways: 
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NMR Spectroscopy

This animation shows how hydrogen nuclei can be thought of as tiny bar magnets  ​Proton NMR produces a spectrum with a  number of peaks.  The number of peaks corresponds to the number of different chemical environments in which protons exist.  High resolution NMR - reveals a splitting pattern Enter your text ...
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Electronegativity

 Electronegativity values allow us to predict the direction and strength of dipoles which might exist in molecules
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Ionic Bonding

Conductivity when molten  Background ​When a metal combines with a non metal - the compound formed is usually ionic. Ionic compounds tend to form giant lattices. Ionic lattices have some distinctive physical properties: High melting points Conduct an electric current when molten​ They form crystals Many will dissolve well in water The vid...
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The formulae of ionic compounds

Sodium chloride Ionic compounds form infinite ionic lattices so the formula is given by the empirical formula, showing only the (simplest) mole ratio between the cations and the anions. We can work out this ratio by the charges of the ions.  Remember: The total charge of an ionic compound is always zero. With sodium chloride: ​ the Chloride io...
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Redox Chemistry

Oxidation and reduction reactions are very commonplace and therefore occupy an important place in A level chemistry . Before tackling this topic you should ensure that you can: use the OIL RIG mnemonic to decide if a reaction is oxidation or reduction recall the reactivity series for metals, carbon and hydrogen work out simple ionic ...
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Intermolecular forces

Before tackling this topic make sure you are  able to: ​ ​ ​ explain the difference between inter molecular and intra molecular forces.  use electronegativity values  to work out dipoles within molecules use ideas about molecular shapes and dipoles to predict whether or not a molecule is polar.  Trends in Boi...
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Atomic structure

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Your carbon footprint

reducing your carbon footprint Although this is aimed at students of the IB diploma - it is relevant to all .... Enter your text here ...
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Acids, Bases, pH, Indicators and Buffers

Background  ​This topic is mostly about equilibria so it is important for students to understand that concept first. Before tackling this topic make sure you : ​ understand dynamic equilibria can write and manipulate equilibrium expressions for a range of reactions . can estimate the pH value of a solution using universal indicator  ...
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Methane, Ammonia and Water

​The images in this slideshow here show how we can account for the way in which electrons are shared between atoms. This produces a full outer shell of electrons for the atoms involved and results in the formation of stable molecules.  Use the three buttons to the top to see three different representations of the molecules
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