Testing for water
Water is an odourless, colourless liquid. So are many other chemicals .
Water has no obvious smell. Water has no taste and water is colourless.
Water has a neutral pH value ( pH 7).
Many other chemical substances have similar properties . We therefore need to find a chemiscal test for water.
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When water is added to anhydrous (white) copper sulfate the copper sulfate turns blue and gives off heat. This is a reversible reaction meaning that if we heat the blue hydrated copper sulfate water will boil off and the copper sulfate will turn white.
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