hydrate

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hydrate

(hī`drāt), chemical compound that contains water. A common hydrate is the familiar blue vitriol, a crystalline form of cupric sulfatecupric sulfate
or copper (II) sulfate,
chemical compound, CuSO4, taking the form of white rhombohedral crystals or amorphous powder. It decomposes at 650°C; to cupric oxide (CuO).
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. Chemically, it is cupric sulfate pentahydrate, CuSO4·5H2O. When a crystal of the substance is formed, five molecules of water (H2O) are combined in the crystal with each molecule of cupric sulfate (CuSO4). This water is called water of crystallization. When cupric sulfate pentahydrate is heated above 150°C; the water of crystallization is driven off and anhydrous cupric sulfate is formed. It has several properties different from the pentahydrate, e.g., color, density, and crystal structure. Glauber's saltGlauber's salt,
common name for sodium sulfate decahydrate, Na2SO4·10H2O; it occurs as white or colorless monoclinic crystals. Upon exposure to fairly dry air it effloresces, forming powdery anhydrous sodium sulfate.
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 is sodium sulfate decahydrate, Na2SO4·10H2O. Crystals of it readily give up their water of crystallization at ordinary temperatures, forming a powdery coating of the anhydrous salt; this phenomenon (efflorescence) is exhibited by many hydrates. The number of molecules of water present in a given hydrate is fixed. However, some substances form several different hydrates. There are four different hydrates of ferrous sulfate, each with its own unique physical properties. In organic chemistry a compound formed by addition of water to a carbon-carbon double bond is sometimes called a hydrate; it contains a hydroxyl functional group and usually cannot be dehydrated. In commerce a metal hydroxide is sometimes called a hydrate; e.g., calcium hydrate is calcium hydroxide.

hydrate

[′hī‚drāt]
(chemistry)
A form of a solid compound which has water in the form of H2 O molecules associated with it; for example, anhydrous copper sulfate is a white solid with the formula CuSO4, but when crystallized from water a blue crystalline solid with formula CuSO4·5H2 O results, and the water molecules are an integral part of the crystal.
A crystalline compound resulting from the combination of water and a gas; frequently a constituent of natural gas that is under pressure.

hydrate

1. To combine with water or elements of water.
2. Hydrated lime.

hydrate

1. a chemical compound containing water that is chemically combined with a substance and can usually be expelled without changing the constitution of the substance
2. a chemical compound that can dissociate reversibly into water and another compound. For example sulphuric acid (H2SO4) dissociates into sulphur trioxide (SO3) and water (H2O)
3. a chemical compound, such as a carbohydrate, that contains hydrogen and oxygen atoms in the ratio two to one
References in periodicals archive ?
Men today typically use about four or five products most of the time (a no-frills hydrator, a lip balm, a clear shave gel, and a dirt removing, pore-reducing masque), thus don't need a large traditional Dopp kit.
This multi-tasking hydrator helps to maintain fresh, youthful skin by clearing and tightening pores for a refined complexion.
The Axe Face range includes similar products--Face Wash, Shave Gel and Hydrator, a 2-in-1 post-shave gel and moisturizer.
The perfect shake for Tom is aptly named the Healthy Hydrator and includes a balance of all the fluids and carbs he needs to do his best at the Aquatics Centre.
One product I love is Clinique's new Moisture Surge Intense Skin Fortifying Hydrator, www.
One product I really recommend is Clinique's new Moisture Surge Intense Skin Fortifying Hydrator, pounds 32 - www.
The advanced skin cream formula combines botanical ingredients (Cepalin, proprietary extract and cen-tella asiatica leaf extract) with a unique skin hydrator (hyaluronic acid) for maximum effectiveness.
For devotees of Molton Brown, try the Skinpure Cleanser (pounds 17), and for blokes Ultra Light Bai Ji Hydrator (pounds 22.
I tried MOLTON BROWN'S ACTIVE DEFENCE CITY DAY HYDRATOR SPF after a friend recommended it.
When colouring your hair, ensure it is kept in top condition by replacing lost moisture with a richly-formulated shampoo and conditioner, such as my Re-Moisturising range or Tesco's Nourisher Shampoo and Hydrator Conditioner (both pounds 2.
Created from a one-of-a-kind formulation whose leading ingredient Cocoa Butter is nature's ultimate hydrator, the new rich, thick balm gives a slight warming feel when applied at the same time it soothes and balances the skin to enhance its texture and tone.
A limited edition from Clinique this spring is all about moisture body hydrator with soothing aloe for pounds 20.