All Separation articles – Page 5

Class experiment

Chromatography of sweets | 11–14 years

In association with Nuffield Foundation, By Holly Walsh and Sandrine Bouchelkia

Try this class practical to carry out chromatography using dye from different coloured M&M’s®. Includes kit list and safety instructions.

Demonstration

Silver and lead halides

In association with Nuffield Foundation

Try this practical or demonstration to produce silver and lead halides in a series of precipitation reactions. 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.

Class experiment

The fractional distillation of crude oil

In association with Nuffield Foundation

Try this class practical or demonstration to simulate the industrial fractional distillation of crude oil. Includes kit list and safety instructions.

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

Preparing a soluble salt by neutralisation

In association with Nuffield Foundation

In this practical, students react alkaline ammonia with sulfuric acid to form the soluble salt ammonium sulfate. Includes kit list and safety instructions.

Resource

Separating Mixtures

Covers methods of separation through to separating mixtures of minerals on the basis of their different physical properties.

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Faces of Chemistry – Packaging gases

Discover how scientists from BOC remove gases from the air and use them in food packaging and processing.

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‘Recycle shipwrecked cargo’ demands group

Recycle, reuse and rediscover with this shipwreck themed experiment. Includes kit list and safety instructions. 

Resource

Pigments

Discover how we can extract dye materials from plants in this explorative practical, includes kit list and safety instructions.

Resource

Is the secretary guilty? | 14–16 years

In this practical, your learners become chemical detectives by carrying out an investigation using separation techniques

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Chewing Gum: Laboratory Exercise

This laboratory-based resource consists of an investigation into the composition of flavourings chemicals present in chewing gum.

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On This Day - Mar 05 : Emmett Culligan was born

He invented the Culligan water softener system, which made water softening available to home users. This system uses minerals called zeolites, which filter calcium (Ca), magnesium (Mg), and other metal cations from hard water.