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Guidance on how to prepare potassium metabisulfite and sodium metabisulfite solutions.
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The Landolt method (potassium iodate(V) and sodium metabisulfite) was the first iodine clock reaction described, and can be used for a simple two-reagent investigation.
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Hazcard – COSHH model risk assessment for sodium metabisulfite (sodium disulfite, disodium disulfate(IV)), sodium bisulfite (sodium hydrogensulfite, sodium hydrogensulfate(IV)), sodium sulfite (sodium.. more
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Using these sodium salts safely in practical work, Includes metabisulfite and the equivalent  potassium salts. Sodium sulfite is also known as sodium sulfate(IV), sodium hydrogensulfite  as sodium hyd.. more
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Guidance on how to prepare sulfur dioxide solutions. Two methods are described along with a note on how to make an 'acid rain' solution.
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Guidance on how to prepare sulfur dioxide gas. 
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Precautions needed when using sulfur dioxide, preparing it or where it may be a by-product of a reaction.
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Index to currently published guidance on the preparation of specific solutions and other reagents. Includes a summary Contents List giving the dates of the most recent versions of recipes. Note: this .. more
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Complete index for the Student Safety Sheets
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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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