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Principle

The electrolysis of molten sodium chloride to obtain chlorine and sodium, which can be used to produce sodium hydroxide, is an important industrial-scale process. The experiment is a simple demonstration of the important steps in this process. Due to the high melting point of sodium chloride, lead chloride (with a lower melting point) is used as starting material in the model experiment (instead of sodium chloride)

Benefits

1. Easy and fast experiment set-up
2. Impressive demonstration how to produce alkali metals like sodium

Tasks

Demonstration the electrolysis of molten sodium chloride to obtain chlorine and sodium.

Learning objectives

1. Electrolysis
2. Fused-salt electrolysis
3. Preparation of Chlorine and sodium