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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
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PP011 - Testing for carbonyl compounds with Fehling's solution
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Although both aldehydes and ketones contain the carbonyl functional group (-C=O), only aldehydes give a positive test (formation of an orange to brick-red precipitate of copper(I) oxide) with Fehling’.. more
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RB046 - Indicators (acid-base)
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Guidance on how to prepare indicators (acid-base). 
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TL004 - Extracting limonene
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The chemistry of extracting substances from plant materials is important because many such compounds are physically active, either medically or aesthetically (perfumes). This guide describe a small-s.. more
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PP094 - Bromine clock reactions: disappearing pink
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The kinetics of a reaction can be investigated by determining how the rate of the reaction varies with the concentration of the reactants. The 'disappearing pink' method provides an alternative to iod.. more
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PP099 – Testing for positive ions: non-transition metals
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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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PP057 - Making a Universal Indicator- A Microscale Approach
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This activity can be used as an introduction to microscale drop, or “puddle” chemistry. It demonstrates that indicators do not always change at pH7.
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GL018 - Food tests
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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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PP130 - Making azo dyes
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Azo dyes provide an opportunity for students to carry out a simple multi-step organic synthesis. The methods provided here could be the basis for a student investigation into the effects of different .. more
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RB048 - Indicators for carbon dioxide
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Guidance on how to prepare indicators for carbon dioxide.
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