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You are here: Home / Explanatory Dictionary / LaneLier’s Index

LaneLier’s Index

a calculated number used to predict whether or not a water will precipitate, be in equilibrium with, or dissolved calcium carbonate. It is sometimes erroneously assumed that any water which tend to dissolves calcium carbonate is automatically corrosive.

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Water Quality Specialists

Definitioner

Precipitate
to cause a dissolved substance to form a solid particle which can be removed by settling or filtering, such as the removal of dissolved iron by oxidation, precipitation, and filtration. The term is also used to refer to the solid formed, and to the condensation of water in the atmosphere to form rain or snow.
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.