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PP036 - Exploring equilibria: cobalt(II) complexes
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A relatively simple activity involving two vividly coloured cobalt(II) complexes in solution can be used to illustrate the effects of changing conditions (concentration, temperature) on a reaction at .. more
words matched: complexes
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PP100 – Testing for positive ions: transition metals ions
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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
words matched: complexes
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PP098 – Testing for positive ions: reactions with hydroxides and ammonia
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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 .. more
words matched: complexes
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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
words matched: complexes
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PX025 - Cobalt(II) compounds
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Brief risk assessment guidance and experimental notes for a range of activities involving cobalt(II) compounds.
words matched: complexes
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TL002 - Cigarette burning
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A cigarette burning is an example of incomplete combustion of a complex mix of chemicals, wheremany of the products are toxic. This demonstration should reinforce the message that during smoking,even .. more
words matched: complexes
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PP067 - Distillation of copper(II) sulfate
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With careful supervision, students can carry a simple distillation to separate a pure substance (water) from a solution (copper(II) sulfate). This can be achieved by using a side-arm boiling tube inst.. more
words matched: complexes
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SRA029 - Use of liquid nitrogen
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A variety of simple and more complex demonstrations can be performed using liquid nitrogen.
words matched: complexes
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PP097 –Testing for common negative ions - additional ions
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The additional negative ions test tube reactions for nitrate(III), nitrate(V), sulfate(IV), phosphate and carboxylates (methanoate and ethanoate).
words matched: complexes
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PP093 - Iodine clock reaction: Harcourt-Essen method
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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 Harcourt-Essen method is useful as the reaction kinetics .. more
words matched: complexes
Showing results 1 to 10 of 92
1 234►