Skip to main content

Solubility patterns among anions of the halogens on microscale

Description

On a microscale students add solutions containing lithium, calcium and silver cations to solutions containing fluoride, chloride, bromide and iodide anions, and record which combinations produce an insoluble precipitate. From the results they attempt to identify patterns of behaviour among these anions, and try to explain them.

Credits

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



Apparatus Chemicals

Each working group will need:

Eye protection

Clear acetate sheet (e.g. OHP sheet), or clear plastic spotting plate (well-plate) (Note 1)

Solutions (about 2 cm3) contained in plastic pipettes (Note 2)

Silver nitrate, 0.1 M

Lithium bromide, 1 M

Calcium nitrate, 0.4 M

Sodium fluoride, 0.5 M (HARMFUL)

Sodium chloride, 0.2 M

Potassium bromide, 0.2 M

Potassium iodide, 0.2 M

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

 



 




On a microscale students add solutions containing lithium, calcium and silver cations to solutions containing fluoride, chloride, bromide and iodide anions, and record which combinations produce an insoluble precipitate. From the results they attempt to identify patterns of behaviour among these anions, and try to explain them.

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 .