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You are here: Home / Explanatory Dictionary / Limestone

Limestone

a sedimentary rock, largely calcium carbonate, usually also containing significant amounts of magnesium carbonate.

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Definitioner

Magnesium: one of the elements making up the earths crust, the compounds of which when dis-solved in water make the water hard. The presence of magnesium in water is a factor contributing to the formation of scale and insoluble soap curds.
Carbonate: the Co3- ion.
Calcium: one of the principal elements making up the earths crust, the compounds of which make the water hard. The presence of calcium in water is a factor contributing to the formation of scale and insoluble soap curds which are a means of clearly identifying hard water.