Evaporite of hard water

Evaporite of hard water

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Credit: SCIENCE PHOTO LIBRARY

Caption: Evaporites of hard water. Hard water contains dissolved minerals, commonly calcium bicarbonates. When the water evaporates, the bicarbonate is left behind as limescale. Distilled water has all the minerals removed from it, so leaves a clean dish when evaporated.

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Keywords: black background, calcium bicarbonate, calcium carbonate, demonstration, deposit, dish, evaporation, evaporation dish, evaporite, evaporites, glass, hard water, impure, impurity, lime scale, limescale, no-one, nobody, school experiment, school science, science education, watch glass, watchglass

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