Preparing and using cobalt chloride indicator papers

A petri dish containing a pink aqueous solution of cobalt chloride

Source: © Shutterstock

Make your own cobalt chloride indicator papers, which can be used to test for the presence of water. Includes kit list and safety instructions.

This resource provides instructions for preparing your own cobalt chloride indicator papers. You can use the papers to test for the presence of water, where the colour changes from blue to pink.

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