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Electrolysis of molten zinc chloride

Description

This demonstration shows that an ionic salt will conduct electricity when molten but not when solid. Zinc chloride is used - this will melt at Bunsen burner temperatures.

Credits

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



Apparatus Chemicals

Eye protection

Fume cupboard

Low voltage (0-12 V) powerpack and electrical leads

Graphite electrodes, 2, supported in an electrode holder or bung

Ammeter and/or bulb (in holder)

Circuit tester (optional)

Bunsen burner, tripod and heat resistant mat

Pipeclay triangle

Crucible

Clamp and stand

Metal spatula

Tongs

Plastic beaker

Filter paper and funnel

Indicator paper and/or starch-iodide paper

Solid zinc chloride (CORROSIVE, DANGER TO THE ENVIRONMENT)

Distilled water

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

 









Page last updated October 2015

This demonstration shows that an ionic salt will conduct electricity when molten but not when solid. Zinc chloride is used - this will melt at Bunsen burner temperatures.

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