All Experiment articles – Page 9
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Experiment‘Magic’ writing with colour changing reactions
Reveal invisible messages or pictures drawn with aqueous solutions by spraying them with suitable reagents in this demonstration. Includes kit list and safety instructions.
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ExperimentFloating and sinking bubbles
Make bubbles of carbon dioxide, hydrogen or methane in this demonstration exploring density, diffusion and solubility. Includes kit list and safety instructions.
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ExperimentSodium ethanoate ‘stalagmite’
Quickly grow your own ‘stalagmite’ from a supersaturated solution of sodium ethanoate in this demonstration. Includes kit list and safety instructions.
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ExperimentFlame colours: a demonstration
Explore how different elements rect when exposed to a flame, and discuss how alkali metals, alkaline earth metals, and metal salts change the colour of fire.
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ExperimentMicroscale extraction of copper
Try this practical to reduce copper(II) oxide to copper using hydrogen, revealing their positions in the reactivity series. Includes kit list and safety instructions.
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ExperimentA hydrogen powered rocket
Try this spectacular demonstration to make a rocket using a plastic drink bottle fuelled by hydrogen and air. Includes kit list and safety instructions.
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ExperimentInvestigating the solubility of lead halides
Encourage students to make and test predictions about the pattern of solubility among lead halides in this practical. Includes kit list and safety instructions.
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ExperimentThe ‘whoosh’ bottle demonstration
This exciting demonstration is a combustion reaction where a mixture of alcohol and air in a large bottle is ignited. Includes kit list and safety instructions.
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ExperimentExtraction of iron on a match head
Try this practical as a small scale example of metal extraction, reducing iron(III) oxide with carbon on a match head. Includes kit list and safety instructions.
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ExperimentColourimetric determination of copper ore
Use this practical to introduce students to the determination of copper ore by colourimetry using copper(II) sulfate. Includes kit list and safety instructions.
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ExperimentPurifying an impure solid
Purify alum as an example of obtaining a pure chemical from an impure sample in this class practical. Includes kit list and safety instructions.
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ExperimentLeaf chromatography
Try this class practical to use paper chromatography to separate and investigate the pigments in a leaf. Includes kit list and safety instructions.
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ExperimentExothermic redox reaction of zinc with iodine
Using an exothermic redox reaction between zinc and iodine, student will make zinc iodide. This can be reversed using electrolysis to decompose the compound.
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ExperimentThe change in mass when magnesium burns
A class practical to measure the change in mass when magnesium burns and to find the formula of magnesium oxide. Includes kit list and safety instructions.
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ExperimentHeating copper in air
Explore the reaction of copper with oxygen, producing copper oxide, when a copper envelope is heated in air in this practical. Includes kit list and safety instructions.
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ExperimentThe density of ice
Demonstrate to students what happens as ice cubes floating on oil start to melt and the density of the water changes. Includes kit list and safety instructions.
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ExperimentMelting and freezing stearic acid
In this class practical students take the temperature of stearic acid at regular intervals as they heat and cool it. Includes kit list and safety instructions.
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ExperimentThe sublimation of air freshener | 11–14 years
Use this experiment to demonstrate sublimation, showing how solid air freshener changes directly from a solid to a gas. Includes kit list and safety instructions.
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ExperimentRate of evaporation
Use this class practical to measure and compare the rate of evaporation of propanone under different conditions. Includes kit list and safety instructions.
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ExperimentA solid–solid reaction between lead nitrate and potassium iodide
Use this demonstration with kit list and safety instructions to prove that two solids can react together, making lead iodide from lead nitrate and potassium iodide.