All Compounds and mixtures articles – Page 5

Class experiment
A reversible reaction of hydrated copper(II) sulfate

In association with Nuffield Foundation

A class practical which investigates the reversible reaction of hydrated copper(II) sulfate. Includes kit list and safety instructions.
Demonstration
What are the dissolved solids in seawater?

In association with Nuffield Foundation

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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Oil 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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Making 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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Tyndall 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.
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Making marbled paper

In this practical, students create a marble effect on paper, using their knowledge of mixtures and hydrophobic solutions to explain the phenomena. Also, students use their evaluating skills to determine which method produces the best result.
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Water drop art

In this practical, students observe and report what happens when water is placed on waxed paper, and a splint or toothpick is positioned close to the droplets.
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The Chemistry of Light: Part 1

A series of short experiments and demonstrations about the chemistry of light, taken from a lecture by Peter Wothers from the University of Cambridge Video: The Chemistry of Light: 01 - Introduction Video: The Chemistry of Light: 02 - Oil Lamps & Candles ...
Class experiment
Recovering water from copper(II) sulfate solution

In association with Nuffield Foundation

Try this practical to introduce students to aqueous solutions by distilling water from copper(II) sulfate solution. Includes kit list and safety instructions.
Class experiment
Which substances conduct electricity?

In association with Nuffield Foundation

In this class practical, students test the conductivity of covalent and ionic substances in solid and molten states. Includes kit list and safety instructions.
Demonstration
How can hardness in water be removed?

In association with Nuffield Foundation

Investigate the effects of three treatments for softening hard water in this class practical and demonstration. Includes kit list and safety instructions.
Class experiment
Emulsifiers in the kitchen

In association with Nuffield Foundation

Test a range of common ingredients to see which ones stabilise an oil and water emulsion in this class practical. Includes kit list and safety instructions.
Class experiment
Making solder as an alloy of tin and lead

In association with Nuffield Foundation

Try this practical to make solder by heating together the metals tin and lead before investigating the alloy’s properties. Includes kit list and safety instructions.
Demonstration
Extracting iodine from seaweed

In association with Nuffield Foundation

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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Mixing drinks

The activity uses two methods to develop metacognition. First, students are asked to solve a problem and then reflect on the thinking styles that they used. In the other method students discuss four modelled thinking styles of fictional students.
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Atoms, elements, molecules, compounds and mixtures

This activity is designed to help students clarify the relationship between atoms, elements, molecules, compounds and mixtures. It also develops the skill of using Venn diagrams in organising their understanding.
Demonstration
Distribution of iodine between two immiscible solvents

In association with Nuffield Foundation

Use this class experiment or demonstration to create an equilibrium distribution using iodine in two immiscible solvents. Includes kit list and safety instructions.
Class experiment
Making soaps and detergents using castor oil

In association with Nuffield Foundation

Try this class practical to make a soap or detergent using castor oil and either sodium hydroxide or sulfuric acid. Includes kit list and safety instructions.
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Separating Mixtures

Covers methods of separation through to separating mixtures of minerals on the basis of their different physical properties.
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Atmospheric chemistry by danceroom Spectroscopy (dS)

A series of short videos presented by Dr David Glowacki within an interactive dome called danceroom Spectroscopy (dS).