CLEAPSS Supporting practical science and technology
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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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The metal ions cobalt(II), copper(II), iron(II) and iron(III) can be tested for with simple test tube reactions. These tests are more specific than precipitation reactions with sodium hydroxide soluti.. more
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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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Risk assessment information for phenylethene (styrene) and phenylethyne (phenylactylene) and their polymers. Outline general information for plastics and polymers, including ion exchange resins.
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Qualitative analysis is included in most science and chemistry courses across the 11-19 age range. This guide gives a summary/overview of the currently available CLEAPSS resources that provide detaile.. more
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The flame test technique is very quick and simple method used in qualitative chemistry analysis to identify some of the metal ions.
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This activity dramatically shows the effect of a catalyst, cobalt(II) ions, on a reaction. Other characteristic properties of transition metals (eg, coloured ions, different oxidation state) can be ob.. 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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A microscale activity which demonstrates a number of chemical reaction with ammonia. Because this is microscale, quantities of chemicals used are tiny,  making disposal and clearing up very easy.
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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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