Mychem

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

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 from crystals Many will dissolve well in water The vid...
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The Alkali metals

​Group 1 of the periodic table contains an entertaining family of reactive metals Caesium is rather more reactive  
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Formulae of compounds

A simple way to work out the formula of an ionic compound 
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Redox Chemistry

redox intro

  • Extracting Aluminium
  • Making Iron
  • Chemistrysetting
  • Laser
  • Extracting Aluminium

    • Aluminium is a more reactive than carbon
    • Electrolysis is used to extract it
    • Aluminium ions are reduced to aluminium atoms

    see full presentation

  • Making Iron

    David Fowkes has been teaching chemistry for over 30 years. His teaching career started in at King Edward VI School Southampton. Subsequent posts as Head of Chemistry then Head of Science in Framlingham College and then Rossall School enabled him to develop further resources and techniques for the teaching of chemistry. David was one of the content authors for the highly acclaimed Multimedia Science School by Plato learning and he has published a number of GCSE and A level chemistry texts for Pearson and Nelson Thornes ( now part of Oxford University Press). His current project is the authoring and production of the Philpot Education chemistry support site for students of the International Baccalaureate. David works part-time as Director of the IB Institute at St.Clare's, Oxford.
  • Making Electricity

    Rachael Fowkes has been teaching Biology for over 20 years. Although she has taught at GCSE and junior science levels, she now specialises in the teaching of biology A level and IB . Rachael works part-time as a Biology Lecturer at Brockenhurst College - a post which she has held since 2004. She is also now a progress manager. Rachael has worked as an examiner for Biology A Level for a variety of examining boards including AQA, OCR and WJEC.
  • Chemistrysetting

  • Laser

Metal displacement reactions The first section of this video shows three metal displacement reactions magnified and speeded up. For each reaction: ​ decide which metal is oxidised decide which metal is reduced write two half equations to represent these changes
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Energy changes

Whenever a chemical change takes place there is also an energy exchange of some sort. Sometimes the energy exchange is a release of energy . A fuel is a substance which can be made to react and release energy in a useful form. ​Examples of some exothermic reactions . ​This shows a range of chemical changes - all of which release energy . In so...
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Atomic structure

Enter your text here ...
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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, Alkalis and pH

Background  ​ You should already know that: • some substances are acidic • the opposite of acidic is alkaline  • acids and alkalis can be harmful  • we can measure acidity or alkalinity using the pH scale Strong acids ​When an acid molecule ionises completely when in solution in water, it is regarded as a strong acid. It is said...
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Carboxylic Acids

Carboxylic acids can occur naturally : When alcohols are oxidised they can produce a type of acid known as a carboxylic acid.    one example of a carboxylic acid is ethanoic acid . This is also known as Acetic acid and is the acid found in vinegar. Other examples of carboxylic acids are methanoic acid ( also known as formic acid)  wh...
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Addition Polymers and condensation polymers

​Polymers are a very important group of compounds. Many organic ( carbon based)  molecules can be made to Polymerise. The word "poly" means many.  When a molecule is polymerised the ( usually short) monomer molecules join up with one another to form very long polymer molecules. Addition Polymerisation These two videos show ...
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Reduction of iron

See iron being formed in this violent, reduction reaction.  Iron III oxide and Aluminium react with one another .  Pure iron is produced. Try to write word equations for this reaction  What is reduced in this reaction?  What is oxidised? Magnesium ribbon is used as the fuse. Main reaction  Fuse  reaction Symb...
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