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The additional negative ions test tube reactions for nitrate(III), nitrate(V), sulfate(IV), phosphate and carboxylates (methanoate and ethanoate).
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This document explains how to carry out a circus of qualitative food tests for:carbohydratesstarch – iodine testreducing sugars - Benedict’s testnon-reducing sugars – hydrolysis then Benedict’s test p.. more
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Brief risk assessment guidance and experimental notes for a range of activities involving barium nitrate(V) and barium peroxide (Hazcard 11).
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Editorial - safety who's responsibility is it?, website news, primary liaison/transition ideas, CE markings and what they really mean, top ten issues found when auditing Science and D&T, Petrifilm fro.. more
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This edition includes notes on the transit of Venus June 2004, unblocking lab gas taps, the introduction of the DSEAR (Dangerous Substances and Explosive Atmospheres) Regulations, and two incidents in.. more
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The common negative ions, carbonate (CO32-), sulfate(VI) (SO42-) and the halides (Cl–, Br– and I–) can be simply tested for in test tube reactions. The method described here uses a more dilute ammo.. more
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Common anions are tested on a plastic covered worksheet, for quick easy disposal. Using solutions with minimum concentrations allows closer observations and initiates talking points. Students can phot.. more
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Brief risk assessment guidance and experimental notes for a range of activities involving ammonium salts (Hazcards 9A and 9B).
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Testing for common gases is included in most chemistry courses. In this procedure students make their own sample of hydrogen gas to test.
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Safety precautions for practical food testing activities for carbohydrates, lipids and proteins.
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