An industrial chemist is given a sample of liquid phosphorus trichloride (PCl3\text{PCl}_3PCl3) and a sample of molten magnesium chloride (MgCl2\text{MgCl}_2MgCl2).
Describe a simple electrical experiment the chemist could perform to demonstrate that molten magnesium chloride contains charged particles that are free to move, whereas liquid phosphorus trichloride does not.
59 exam-style questions on Edexcel GCSE Chemistry 2.5 Types of substance, covering 2.5.1 Classifying substances by structure and bonding, 2.5.2 Properties of ionic and simple molecular substances, 2.5.3 Giant covalent structures: diamond and graphite, 2.5.4 Fullerenes, graphene and simple polymers, 2.5.5 Properties of metals and non-metals, and 2.5.6 Limitations of bonding models and representations. Each one has a worked solution and a mark scheme showing where the marks go.