What does alkali mean?
Definitions for alkali
This dictionary definitions page includes all the possible meanings, example usage and translations of the word alkali.
any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water
"bases include oxides and hydroxides of metals and ammonia"
a mixture of soluble salts found in arid soils and some bodies of water; detrimental to agriculture
Soluble mineral matter, other than common salt, contained in soils of natural waters.
One of a class of caustic bases, such as soda, potash, ammonia, and lithia, whose distinguishing peculiarities are solubility in alcohol and water, uniting with oils and fats to form soap, neutralizing and forming salts with acids, turning to brown several vegetable yellows, and changing reddened litmus to blue.
Soda ash; caustic soda, caustic potash, etc.
Etymology: French alcali, ultimately from قلي, from قلى.
Samuel Johnson's Dictionary
This herb they burnt to ashes, boiled them in water, and, after having evaporated the water, there remained at the bottom a white salt; this they called sal kali, or alkali. It is corrosive, producing putrefaction in animal substances, to which it is applied. John Arbuthnot on Aliments.
Etymology: The word alkali comes from an herb, called by the Egyptians kali; by us glasswort.
In chemistry, an alkali (; from Arabic: القلوي, romanized: al-qaly, lit. 'ashes of the saltwort') is a basic, ionic salt of an alkali metal or an alkaline earth metal. An alkali can also be defined as a base that dissolves in water. A solution of a soluble base has a pH greater than 7.0. The adjective alkaline, and less often, alkalescent, is commonly used in English as a synonym for basic, especially for bases soluble in water. This broad use of the term is likely to have come about because alkalis were the first bases known to obey the Arrhenius definition of a base, and they are still among the most common bases.
soda ash; caustic soda, caustic potash, etc
one of a class of caustic bases, such as soda, potash, ammonia, and lithia, whose distinguishing peculiarities are solubility in alcohol and water, uniting with oils and fats to form soap, neutralizing and forming salts with acids, turning to brown several vegetable yellows, and changing reddened litmus to blue
Etymology: [F. alcali, ultimately fr. Ar. alqal ashes of the plant saltwort, fr. qalay to roast in a pan, fry.]
In chemistry, an alkali is a basic, ionic salt of an alkali metal or alkaline earth metal element. Some authors also define an alkali as a base that dissolves in water. A solution of a soluble base has a pH greater than 7. The adjective alkaline is commonly used in English as a synonym for base, especially for soluble bases. This broad use of the term is likely to have come about because alkalis were the first bases known to obey the Arrhenius definition of a base and are still among the more common bases.
Chambers 20th Century Dictionary
al′ka-li, or -lī, n. (chem.) a substance which combines with an acid and neutralises it, forming a salt. Potash, soda, and lime are alkalies; they have an acrid taste (that of soap), and turn vegetable blues to green:—pl. Al′kalies.—n. Alkales′cency, tendency to become alkaline.—adj. Alkales′cent, tending to become alkaline: slightly alkaline.—n. Alkalim′eter, an instrument for measuring the strength of alkalies.—adj. Alkaline (al′ka-līn, or -lin), having the properties of an alkali.—n. Alkalin′ity.—v.t. Al′kalise, to render alkaline:—pr.p. al′kalīsing; pa.p. al′kalīsed. See Acid. [Ar. al-qalīy, ashes.]
The numerical value of alkali in Chaldean Numerology is: 2
The numerical value of alkali in Pythagorean Numerology is: 1
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