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Risk assessment information for white (or yellow) phosphorus. See Hazcard 73B for red phosphorus).
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Clear and straightforward instructions and explanations for using a Bunsen burner correctly.
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Health and safety advice on using sulfur and phosphorus in science practical activities. Includes white sulfur which is no longer readily available in the UK.
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Risk assessment guidance for potassium.
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Includes information on: lead metal, lead(II) carbonates, lead(II) oxide, lead(IV) oxide, dilead(II) lead(IV) oxide (red lead) and lead(II) sulfide (galena).
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Risk assessment information about red phosphorus. For white/yellow phosphorus, see Hazcard 73A.
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Instructions on how to make Arduino Speed of Sound Apparatus. See accompanying zip file GL330a for the Arduino code. 
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The positive ions aluminium (Al3+), potassium (K+), lead(II) (Pb2+) and ammonia (NH4+) can be tested for with simple test tube reactions. These tests are more specific than precipitation reactions wit.. more
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Thin layer chromatography is a quick and effective method of separating pigments within leaves. The pigments run clearly on the chromatogram with little outward spread, allowing Rf values to be calcul.. more
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Straight forward guidance on the safe use of EHT power supplies, including identifying the various coloured connectors found on common school power supplies
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