Alkali soils — Alkali, or alkaline, soils are clay soils with a relatively high exchangeable sodium percentage, a relative high pH (> 9), a poor soil structure and a low infiltration capacity. Often they have a hard calcareous layer at 0.5 to 1 m. depth (in… … Wikipedia
Alkali salts — or base (basic) salts are salts which has basic ions, such as Hydroxides or Carbonates. Rather than being neutral, as most salts are, basic salts are, as their name suggests, bases.The acidic equivalent of a basic salt is an acid salt, although… … Wikipedia
alkali — [al′kə lī΄] n. pl. alkalies or alkalis [ME alkaly < Ar al qily, for al qili, the ashes (of saltwort) < qalai, to roast in a pan] 1. any base or hydroxide, as soda, potash, etc. that is soluble in water and gives a high concentration of… … English World dictionary
Hydroxide — Lewis structure of the hydroxide ion showing three lone pairs on the oxygen atom … Wikipedia
alkali — /al keuh luy /, n., pl. alkalis, alkalies, adj. n. 1. Chem. a. any of various bases, the hydroxides of the alkali metals and of ammonium, that neutralize acids to form salts and turn red litmus paper blue. b. any of various other more or less… … Universalium
Alkali — In chemistry, an alkali (from Arabic: Al Qaly القلي, القالي ) is a basic, ionic salt of an alkali metal or alkaline earth metal element. Alkalis are best known for being bases (compounds with pH greater than 7) that dissolve in water. The… … Wikipedia
alkali metal — Chem. any of the group of univalent metals including potassium, sodium, lithium, rubidium, cesium, and francium, whose hydroxides are alkalis. [1880 85] * * * Any of the six chemical elements in the leftmost group of the periodic table (lithium,… … Universalium
Alkali metal — Group → 1 ↓ Period 2 3 Li 3 … Wikipedia
hydroxide — /huy drok suyd, sid/, n. a chemical compound containing the hydroxyl group. [1820 30; HYDR 2 + OXIDE] * * * Any compound with one or more functional groups made up of one atom each of hydrogen and oxygen, bonded together and acting as the… … Universalium
Alkali manufacture — This is a historical article. For current information see Sodium hydroxide#Manufacture and Chloralkali process. Alkali manufacture is the process by which an alkali is made. Typical alkalis, produced commercially, include sodium hydroxide, sodium … Wikipedia
