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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..
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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..
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Guidance on how to prepare reagents used to test for the presence of cations. This Recipe only includes those reagents that are not covered by other Recipe Sheets.
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Testing for positive ions: reactions with hydroxides and ammonia. This microscale practical is carried out on a worksheet that is laminated or placed in a plastic wallet. The method minimises the use ..
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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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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..
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Testing for positive ions - transition metals ions
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Testing for positive ions - non transition metal ions
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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..
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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..
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