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Hazcard – COSHH model risk assessment for white phosphorus (yellow phosphorus). Read this Hazcard in conjunction with About Hazcards (Guide GL 120).
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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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Hazcard – COSHH model risk assessment for potassium. Read this Hazcard in conjunction with About Hazcards (Guide GL 120).
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Hazcard – COSHH model risk assessment for lead metal, lead(II) carbonate (cerrusite), lead(II) carbonate hydroxide (basic lead carbonate, white lead), lead(II) oxide (lead monoxide, yellow lead, litha.. more
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Guidance on how to prepare indicators (acid-base). 
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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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