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Colourful electrolysis

Description

An interesting introduction to the electrolysis of brine (sodium chloride solution). Students use Universal Indicator to help them follow what is happening during the reaction.

Credits

:
This is an experiment from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry.
colourful-electrolysis



Apparatus Chemicals

Eye protection

Each working group will require:

U-shaped test tube

Clamp and clamp stand

Carbon electrodes and electrode holders, 2 of each (Note 3)

Electrical leads, 2

Power pack (low voltage, d.c.)

Beaker (100 cm3)

Spatula

Stirring rod

Sodium chloride (table salt) (Note 1)

Universal Indicator solution (FLAMMABLE)

Distilled water (Note 2)

Refer to Health & Safety and Technical notes section below for additional information.

 







Page last updated October 2015

An interesting introduction to the electrolysis of brine (sodium chloride solution). Students use Universal Indicator to help them follow what is happening during the reaction.

ADDITIONAL INFORMATION

This is a resource from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry. This collection of over 200 practical activities demonstrates a wide range of chemical concepts and processes. Each activity contains comprehensive information for teachers and technicians, including full technical notes and step-by-step procedures. Practical Chemistry activities accompany Practical Physics and Practical Biology.

The experiment is also part of the Royal Society of Chemistry's Continuing Professional Development course: Chemistry for non-specialists