All Demonstration articles – Page 4
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DemonstrationThe ‘breathalyser’ reaction | 16–18 years
Try this demonstration to recreate an early ‘breathalyser’ test, passing ethanol vapour through potassium dichromate. Includes kit list and safety instructions
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DemonstrationGenerating, collecting and testing gases
Read our standard guidance on generating, collecting and testing gases during practical experiments, including carbon dioxide, hydrogen, oxygen and chlorine.
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DemonstrationThermal decomposition of nitrates: ‘writing with fire’
Make an invisible message ‘glow’ by applying a lighted splint to filter paper treated with sodium nitrate in this demonstration. Includes kit list and safety instructions.
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DemonstrationDyeing three colours from the same dye bath
Show how dyeing involves chemical interactions between dyes and the molecular nature of different fibres in this demonstration. Includes kit list and safety instructions.
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DemonstrationReacting magnesium with copper(II) oxide
Illustrate reduction, oxidation and the relative reactivity of magnesium and copper(II) oxide in this demonstration. Includes kit list and safety instructions.
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DemonstrationThe effect of concentration on equilibrium | Le Chatelier’s principle
Illustrate the reversible reaction between bismuth(III) oxychloride and bismuth(III) chloride in this demonstration. Includes kit list and safety instructions.
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DemonstrationThe density of carbon dioxide
Illustrate the higher density of carbon dioxide relative to air by pouring it over a lighted candle in this demonstration. Includes kit list and safety instructions.
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DemonstrationThe combustion of iron wool
Try this quick teacher demonstration to demonstrate the increase in mass as iron wool is heated in air. Includes kit list and safety instructions.
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DemonstrationQuantitative electrolysis of aqueous copper(II) sulfate
Use this demonstration to find the value of the Faraday constant from electrolysis of copper(II) sulfate solution. Includes kit list and safety instructions.
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DemonstrationLiquefying chlorine gas
Use this demonstration to produce liquid chlorine and compare it with bromine and iodine in their condensed state. Includes kit list and safety instructions.
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DemonstrationExtracting iodine from seaweed
Discover how ribbon seaweed (or kelp) can be used as a source of iodine in this demonstration or class experiment. Includes kit list and safety instructions.
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DemonstrationA controlled explosion using hydrogen and air
Show how a hydrogen–air mixture can gain explosive properties using a plastic drink bottle in this demonstration. Includes kit list and safety instructions.
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DemonstrationExploding a tin can using methane
Use this demonstration to illustrate how methane can create an explosive mixture with the oxygen in air. Includes kit list and safety instructions.
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DemonstrationIodine clock reaction demonstration method
Use this iodine clock reaction demonstration to introduce your students to rates of reaction and kinetics. Includes kit list and safety instructions.
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DemonstrationA spontaneous exothermic reaction
Illustrate the reaction between glycerol and potassium manganate(VII) to produce flames and steam in this demonstration. Includes kit list and safety instructions.
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DemonstrationThe ‘blue bottle’ experiment
In this demonstration, the redox indicator Methylene blue can be oxidised many times by shaking. Includes kit list and safety instructions.
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DemonstrationThe thermite reaction between aluminium and iron(III) oxide
Illustrate a highly exothermic thermite reaction resulting in molten iron in this teacher demonstration. Includes kit list and safety instructions.
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DemonstrationCombustion of ethanol
Illustrate the large energy changes that take place during the combustion of alcohols with this spectacular demonstration. Includes kit list and safety instructions.
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DemonstrationColourful reactions using ammonia solution
Turn ammonia solution red, white or blue by adding phenolphthalein, lead nitrate or copper(II) sulfate in this demonstration. Includes kit list and safety instructions.
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DemonstrationElectrolysis of molten lead(II) bromide
Introduce your students to the study of electrolysis through the production of metallic lead and bromine in this demonstration. Includes kit list and safety instructions.