Cobalt chloride test for water

Cobalt chloride test for water

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This image is part of the sequence Science and technology: Cobalt chloride test for water

Credit: MARTYN F. CHILLMAID/SCIENCE PHOTO LIBRARY

Caption: The cobalt chloride test for water. The blue cobalt chloride test paper is held over a test tube of water. It is important that the paper is stored in low humidity before the test since exposure to 55% relative humidity or greater is sufficient to cause a slow color change.

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Keywords: blue, chemical, chemistry, cobalt (ii) chloride, cobalt chloride, cobalt chloride test paper, color, color change, colour, colour change, experiment, humidity, no-one, nobody, school science, science education, test, test tube, vapor, vapour, water, white background

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