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Preparing and using cobalt chloride indicator papers

Description

This resource provide instruction for preparing your own cobalt chloride indicator papers. The papers are used to test for the presence of water. They will change from blue to pink in the presence of water.

Credits

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


Apparatus Chemicals

Filter paper

Drying oven set at 100oC

Desiccator

 

Hexahydrate cobalt(II) chloride CoCl2.6H2O (TOXIC, DANGEROUS FOR THE ENVIRONMENT, SENSITISER ) 5 g

Water 100 cm3

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

Read our standard health & safety guidance

Cobalt chloride is TOXIC and DANGEROUS FOR THE ENVIRONMENT and May cause sensitisation. The indicator papers should be handled as little as possible and hands washed after use.




Page last updated October 2015

This resource provide instruction for preparing your own cobalt chloride indicator papers. The papers are used to test for the presence of water. They will change from blue to pink in the presence of water.

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 .