hydrate


Also found in: Dictionary, Thesaurus, Medical, Acronyms, Wikipedia.
Related to hydrate: Methane hydrate, Gas hydrate

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).
..... Click the link for more information.
. 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.
..... Click the link for more information.
 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 ?
Estimates of potentially recoverable reserves of ethane and methane in offshore Azeri hydrate formations for commercial use vary from 28 to 60 TCM.
It is also important to note that condensed water is not required for hydrate formation and hydrates can form from water vapor.
49% mole with the 5 days' hydrate synthesis, the ethane concentration is 10.
In essence, gas hydrates offshore Pakistan are slowly melting today in shallow water zones under the influence of warm bottom waters while gas hydrates are formed in the ocean at deeper levels within the sediment.
It removed more than 90 percent of the salt compared to 70 percent with the previous gas hydrate technique.
After narrowing down areas that appear to be promising, the government plans to conduct drilling for the methane hydrate in fiscal 2014, officials of the agency said.
The team will experiment on a range of sediment types, such as sand and mud, to map out the acoustic and electrical properties of differing amounts of free methane gas and frozen solid methane hydrate.
The National Institute of Advanced Industrial Science and Technology puts the total hydrate in the waters around Japan at enough to cover nearer 100 years of the country's needs.
The compact structure of a basic hydrate unit, how to look for hydrates at sea, role of the Hydrate Stability Zone, environmental impact of gas hydrates, and hazards associated with hydrates are all explored within this report.
Keshavarz underlined the importance of using gas hydrate as replacement to fossil fuels, saying "After exploitation, every cubic meter of gas hydrate will produce heat equal to 164 cubic meters of gas.
Based on the latest studies in the Sea of Oman region which spreads from the West of the Persian Gulf to the Eastern part of the country, we have discovered gas hydrate reservoirs equal to the country's proven oil and gas reserves," The CEO of the project for the exploration of the Sea of Oman's gas hydrate resources, Nasser Keshavarz, said at a press conference in Tehran on Monday.
A good portion of the carbon on Earth is stored in the seafloor as methane hydrate, a frozen mixture of methane and water formed at high pressure and low temperature.