hydroxide


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hydroxide

(hīdrŏk`sīd), chemical compound that contains the hydroxyl (−OH) radicalradical,
in chemistry, group of atoms that are joined together in some particular spatial structure and that take part in most chemical reactions as a single unit. Important inorganic radicals include ammonium, NH4; carbonate, CO3 ; chlorate, ClO3
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. The term refers especially to inorganic compounds. Organic compounds that have the hydroxyl radical as a functional groupfunctional group,
in organic chemistry, group of atoms within a molecule that is responsible for certain properties of the molecule and reactions in which it takes part. Organic compounds are frequently classified according to the functional group or groups they contain.
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 are called alcoholsalcohol,
any of a class of organic compounds with the general formula R-OH, where R represents an alkyl group made up of carbon and hydrogen in various proportions and -OH represents one or more hydroxyl groups.
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; the hydroxyl radical is also present in the carboxyl group of organic acids. Most metal hydroxides are bases—they form solutions that have an excess of OH ions and a pH greater than 7, neutralize acids, and change the color of litmus from red to blue. Alkali metal hydroxides such as sodium hydroxidesodium hydroxide,
chemical compound, NaOH, a white crystalline substance that readily absorbs carbon dioxide and moisture from the air. It is very soluble in water, alcohol, and glycerin. It is a caustic and a strong base (see acids and bases).
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 are strong bases and are very soluble in water; alkaline–earth metal hydroxides such as calcium hydroxidecalcium hydroxide,
Ca(OH)2, colorless crystal or white powder. It is prepared by reacting calcium oxide (lime) with water, a process called slaking, and is also known as hydrated lime or slaked lime. When heated above 580°C; it dehydrates, forming the oxide.
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 (slaked lime) are much less soluble in water and are not as strongly basic. Magnesium hydroxide (milk of magnesiamilk of magnesia,
common name for the chemical compound magnesium hydroxide, Mg(OH)2. The viscous, white, mildly alkaline mixture that is used medicinally as an antacid and laxative is a suspension of approximately 8% magnesium hydroxide in water.
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) is only slightly basic. Some hydroxides (e.g., aluminum hydroxide) exhibit amphoterismamphoterism
, in chemistry, the property of certain substances of acting either as acids or as bases depending on the reaction in which they are involved. Many hydroxide compounds are amphoteric.
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, having either acidic or basic properties depending on the reaction in which they are involved. The hydroxides of some nonmetallic elements are acidic; the hydroxide of sulfur, S(OH)6, spontaneously loses two molecules of water to form sulfuric acid, H2SO4. Ammonium hydroxide, NH4OH, is a weak base known only in the solution that is formed when the gas ammoniaammonia,
chemical compound, NH3, colorless gas that is about one half as dense as air at ordinary temperatures and pressures. It has a characteristic pungent, penetrating odor.
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, NH3, dissolves in water.

hydroxide

[hī′dräk‚sīd]
(chemistry)
Compound containing the OH- group; the hydroxides of metals are usually bases and those of nonmetals are usually acids; a hydroxide can be organic or inorganic.

hydroxide

1. a base or alkali containing the ion OH--
2. any compound containing an -OH group
References in periodicals archive ?
Calcium hydroxide residues can react chemically with the sealer reducing its working time and flow rate by increasing its viscosity.
The additive ensures that the metal hydroxide is more effectively dispersed in the melt.
Caption: Examples of joint damage in concrete pavements; damage due to chloride deicers reacting with calcium hydroxide in portland cement concrete to form expansive calcium oxychloride can be quelled by higher substitutions of fly ash for cement.
All production of chlorine, potassium hydroxide and caustic lye using mercury-based amalgam electrolysis has to stop by the end of 2017 due to legislative requirements.
Evonik is already a European market leader for potassium hydroxide solutions and derivatives - as well as a globally leading provider of alkoxides, which also are manufactured by electrolysis in Lulsdorf.
DISSCUSSION: Calcium hydroxide is effective in eliminating the microorganisms from the infected root canals.
The success of calcium hydroxide paste as a root canal dressing is related to its dissociation into calcium and hydroxyl ions.
Investment in new product development and processing technology means that Omex is now the sole UK supplier of magnesium hydroxide suspensions and has also recently started supplying calcium hydroxide suspensions for waste-water treatment applications, as well as magnesium oxide for a wide range of industrial applications.
Specifically, the price for aluminum hydroxide is to be raised by US$90/m.
The study will look at the potential for Galaxy to produce 5,000 tpa of battery grade lithium hydroxide, in addition to Jiangsu's current design of 17,000 tpa of lithium carbonate.
Calcium hydroxide has been used for many years in dentistry.
If we observe the heat that emanates from a non-luminous gas flame, and if we introduce a bit of sodium hydroxide which, as we know, renders it extremely luminous, we see at the same time, that the calorific radiation increases.