anhydride

(redirected from Without water)
Also found in: Dictionary, Thesaurus, Medical.

anhydride

(ănhī`drīd, –drĭd) [Gr.,=without water], chemical compound formed by removing water, H2O, from another compound; the anhydride can also react with water to form the original compound. An acid anhydride reacts with water to form an acid; e.g., sulfur trioxide, SO3, reacts with water to form sulfuric acid, H2SO4. A basic anhydride reacts with water to form a base; e.g., calcium oxide, CaO, reacts with water to form calcium hydroxide, Ca(OH)2. Anhydrides of organic acids have many uses. They react with alcohols to form esters; e.g., acetic anhydride, (CH3CO)2O, reacts with ethanol, C2H5OH, to form ethyl acetate, CH3COOC2H5, a useful solvent. They also react with ammonia and primary or secondary amines to form amides. Other important acid anhydrides include maleic anhydride and phthalic anhydride.

anhydride

[an′hī‚drīd]
(chemistry)
A compound formed from an acid by removal of water.

anhydride

1. a compound that has been formed from another compound by dehydration
2. a compound that forms an acid or base when added to water
3. any organic compound containing the group -CO.O.CO- formed by removal of one water molecule from two carboxyl groups
References in periodicals archive ?
Two schools had to close after being left without water supplies.
Properties across the Stirchley, Brookside, Halesfied, Woodside, Aqueduct and Sutton Hill areas of Telford were without water.
I pity those with young families - pounds 50 for a week without water is a paltry amount for them.
East Dunkard Water Authority received a $4,443,755 loan and a $5,040,141 grant to install almost fourteen miles of new water distribution lines, three new water storage tanks and make other improvements that will allow it to take over a neighboring nonviable water system that loses about half of its water to leaks and whose customers are frequently without water for long periods of time.
Engineers repaired the damage by 11am but some homes remained without water until later in the afternoon.
DISGRUNTLED Colin Reed has hit out after being left without water for more than 20 hours after city council workers hit a water pipe as they worked in a Coventry street.
A burst pipe cut off water to 300 homes in Hexham for more than eight hours yesterday ( and for one family it was the third morning in a row they were without water.
Hundreds of residents in Yarm were without water earlier today.
To make vaccines without water, the researchers prepared microscopic spheres of sugar loaded with tetanus vaccine and suspended them in perfluorocarbons.
In the wake of the thaw that followed arctic weather conditions, burst pipes in the main water supply, plus many in private homes and businesses, have left thousands of people without water.
The residents said they are without water for last three days.
HUNDREDS of people in Birmingham were left without water or had their supplies severely affected today after a mains pipe burst in Edgbaston Road outside Warwickshire Cricket Club, around 6.