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Clear advice and instructions on using a Bunsen burner to heat materials in test tubes.
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Clear instructions and advice on how to safely heat flammable materials in test tubes.
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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 edition includes notes on a career structure for technicians, and tips on making a test-tube rack and sealing a syringe.
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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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This edition includes notes on suggested problems with MDF, laser pointers, storage problems with silicon tetrachloride, issues with fume cupboard testing, a novel method for drying gases, and proble..
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Provides detailed instructions for a simple practical which illustrates some of the working of the gut. Uses sucrose as the starting substrate and DNS reagent or glucose testing strips to identify the..
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Small pieces of sodium and potassium metal are crushed together in a test tube under an inert liquid until the alloy – a liquid at room temperature – is observed to form. There are several possible al..
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Describes an alternative, yet simple, GCSE practical activity which models enzymes working in the gut, using milk and lactase. Uses commonly-available glucose testing strips to determine the course of..
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