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Members only resource
GL243 - Water purification buying guide
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A short overview of the common methods of water purification in school laboratories, include pros and cons. This will be useful for any teacher or technician looking to buy a new water purification sy.. more
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Members only resource
SRA036 - Preparation of a sodium / potassium alloy
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Small pieces of sodium and potassium metal are crushed together in a test tube under an inert liquid until the alloy – a liquid at room temperature – is observed to form. There are several possible al.. more
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Members only resource
PP018 - Preparation of 2-chloro-2-methylpropane
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The synthesis and purification of a liquid organic compound is described. Practical techniques include, liquid-liquid separation, washing, drying and distillation. The % yield of the organic product c.. more
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Members only resource
SRA001 - The howling/screaming jelly baby
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A complete set of risk-assessed instructions for safely demonstrating this exciting chemical reaction.Note:- These activities are designed to be carried out individually as part of a lesson conducted .. more
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Members only resource
HC070B - Phenols (2)
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Hazcard – COSHH model risk assessment for naphthalen-1-ol (1-naphthol, α-naphthol), naphthalen-2-ol (2-naphthol, β-naphthol) and 4-aminophenol (p-aminophenol). Read this Hazcard in conjunction with Ab.. more
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Members only resource
HC019A - Calcium salts (1)
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Hazcard – COSHH model risk assessment for calcium chloride, calcium bromide and calcium fluoride. Read this Hazcard in conjunction with About Hazcards (Guide GL 120).
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Members only resource
HC020b - Carbon disulfide
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Hazcard – COSHH model risk assessment for carbon disulfide. Read this Hazcard in conjunction with About Hazcards (Guide GL 120).
words matched: impurities
Members only resource
HC055A - Iron, its carbonate, oxides & sulfides
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Hazcard – COSHH model risk assessment for iron metal (powder, filings, foil, wire), iron(II) carbonate (saccharated), iron(III) oxide (ferric oxide, haematite), iron(II) iron(III) oxide (magnetite, fe.. more
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Free resource
SSS068 - Ethanal and higher aldehydes
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Using a number of aldehydes safely in practical work. Includes ethanal (acetaldehyde), ethanal tetramer (metaldehyde),  propanal (proprionaldehyde) and butanal (butyraldehyde).
words matched: impurities
Free resource
SSS070 - Dyes and indicators
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Using common dyes and indicators safely in practical activities. Many such compounds , or their solvents, are hazardous but are used in such small amounts and in a very controlled way so as to limit e.. more
words matched: impurities
Showing results 1 to 10 of 32
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