All Compounds and mixtures articles – Page 4
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ResourceCracking Chemistry!
Work your way through these fun chemistry practicals developed by National Science & Engineering Week.
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Class experimentSeparating sand and salt by filtering and evaporation
Try this class experiment to practise manipulating mixtures of soluble and insoluble materials by separating sand and salt. Includes kit list and safety instructions.
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ResourceChemistry in your cupboard: Calgon
Link the post-16 topics of group 2 elements, acids and bases and polymerisation to the topic of hardness of water.
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ResourceConcentration simulation
Explore concentration with this interactive simulation. Add different solutes to water and adjust the controls to change their concentration:
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Class experimentIron and sulfur reaction
This demonstration or class experiment shows the exothermic reaction of iron and sulphur. Includes kit list and safety instructions.
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DemonstrationSodium 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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ResourceMaya and Aztecs: science ideas webs
A web of suggested ideas for linking science with the topic the Maya and Aztecs. You can learn history and science together with activities for different age groups.
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Class 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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Class 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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Class experimentDissolved substances in tap water and seawater
Compare the solids and gases dissolved in tap water and seawater in this class practical and demonstration. Includes kit list and safety instructions.
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Class experimentDisplacement reactions of non-metals
Investigate a displacement series of non-metals using oxygen and chlorine in this class practical or demonstration. Includes kit list and safety instructions.
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DemonstrationRecovering water from a solution using a condenser
Use this demonstration to show how pure water can be recovered from copper sulfate solution using a condenser. Includes kit list and safety instructions.
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ResourceMaking concrete
In this experiment, students determine how different sized materials with binder increase the stability and strength of mortar and concrete. Also, students can test how altering the proportions of cement, water and different aggregates affects concrete’s properties.
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Class experimentWhat ions cause hardness in water?
Investigate how different cations and anions in dissolved salts affect the formation of a lather in this experiment. Includes kit list and safety instructions.
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Class experimentSeparating salts from seawater
Try this simple practical to show that seawater contains a mixture of different salts. Includes kit list and safety instructions.
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Class experimentA reversible reaction of hydrated copper(II) sulfate
A class practical which investigates the reversible reaction of hydrated copper(II) sulfate. Includes kit list and safety instructions.
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DemonstrationWhat are the dissolved solids in seawater?
Analyse the salts that crystallise from evaporating seawater, illustrating cation and anion tests in this demonstration. Includes kit list and safety instructions.
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ResourceOil and water mix
In this practical, students predict and observe what happens when water and alcohol, and water and oil are mixed.
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ResourceMaking an oil-water emulsion
Students observe what happens when oil and water are mixed, and how the results of the experiment change when various substances, including an emulsifier, are added.
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ResourceTyndall effect- why the sky is blue
In this experiment, students observe and report on the Tyndall effect. Also, students use their knowledge of the properties of mixtures and emulsions, and light to explain their observations.