water of hydration

American  

noun

Chemistry.

1. the portion of a hydrate that is represented as, or can be expelled as, water: now usually regarded as being in true molecular combination with the other atoms of the compound, and not existing in the compound as water.

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water of hydration Scientific  

1. Water that is chemically combined with other molecules to form a hydrate mineral and that is easily removed through heating.

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Etymology

Origin of water of hydration

First recorded in 1885–90

Example Sentences

In enamelling it cannot be used; the colour, depending on the water of hydration, being destroyed by a strong heat.

From Project Gutenberg

Conversely, if only 3/4 of the water of hydration be expelled during the baking of gypsum, the material obtained should hydrate itself more slowly.

From Project Gutenberg

The hydrate of baryta melts by a low red heat without losing its water of hydration.

From Project Gutenberg