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This activity is designed to demonstrate that water reaches its maximum density at 4°C. This unusual behaviour relates to hydrogen bonding and explains why ponds freeze from the surface down and not ..
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A straight forward method of how to serially dilute a bacterial broth, and grow colonies, for calculating population density.
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This edition includes notes on fume cupboard testing, working safely with wood dusts, not using mains-powered open wire radiant heaters, dissecting butchers' bits, an introduction to microscale chemis..
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This video demonstrates how to carry out serial dilutions of bacterial broth. Then making lawn plates for counting population density.
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Guidance on how to prepare ethanol/water, methanol/water and
propanone/water solutions.
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Guidance on how to prepare ammonia solution (ammonium hydroxide) and amine solutions. Amines include: methylamine, ethylamine, butylamine and 1,2-diaminoethane.
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Straightforward instructions on using a tap funnel, a piece of equipment used in several chemical preparations and investigations.
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Guidance on how to prepare solutions of ethanoic acid and propanoic acid.
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A diagrammatic guide on how to get started with microbiology, outlining the key actions with links to associated guidance.
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The low melting point of gallium metal is demonstrated, eg by using warm water to melt a sample or by making it into a spoon shape and showing that it melts when used to stir a cup of tea.Note:- These..
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Showing results 1 to 10 of 88
