Cobalt chloride forms pink crystals. When they are heated water is evolved and they turn blue. Explain how you could use cobalt chloride as a test for water
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Hmm, idk, I'll try and see if I could help
Take a solution of the CoCl2.2H2O is pink. Dissolve some of the crystals in water. Dip stips of paper into the solution. Let them dry. The paper strips will turn blue. Place these dried paper strips into an atmosphere you want to test. If it turns pink you know water is present.
2 answers