Definition, Meaning & Synonyms | English word ALKALI

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Definitions of ALKALI

1. (chemistry) One of a class of caustic bases, such as soda, soda ash, caustic soda, potash, ammonia, and lithia, whose distinguishing characteristics are dissolving 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.
2. (Western US) Soluble mineral matter, other than common salt, contained in soils of natural waters.

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Examples of Using ALKALI in a Sentence

• The alkali metals consist of the chemical elements lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr).
• It is a soft, silvery-golden alkali metal with a melting point of , which makes it one of only five elemental metals that are liquid at or near room temperature.
• Grits are a type of porridge made from coarsely ground dried maize or hominy, the latter being maize that has been treated with an alkali in a process called nixtamalization, with the pericarp (ovary wall) removed.
• It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground.
• Like all alkali metals, lithium is highly reactive and flammable, and must be stored in vacuum, inert atmosphere, or inert liquid such as purified kerosene or mineral oil.
• Organometallic chemistry is the study of organometallic compounds, chemical compounds containing at least one chemical bond between a carbon atom of an organic molecule and a metal, including alkali, alkaline earth, and transition metals, and sometimes broadened to include metalloids like boron, silicon, and selenium, as well.
• In the periodic table, potassium is one of the alkali metals, all of which have a single valence electron in the outer electron shell, which is easily removed to create an ion with a positive charge (which combines with anions to form salts).
• The most common members of the feldspar group are the plagioclase (sodium-calcium) feldspars and the alkali (potassium-sodium) feldspars.
• A large part of his work involved identifying plants which grew in that alkali soil and contained substances poisonous to horses, cattle, sheep, and hogs (lechuguilla, yellow-weed, pinguey, locoweed).
• Examples of such crystals are the alkali halides, including potassium fluoride (KF), potassium chloride (KCl), potassium bromide (KBr), potassium iodide (KI), sodium fluoride (NaF).
• Anorthoclase is an intermediate member of the high albite – sanidine alkali feldspar solid solution series.
• The desert lake has an unusually productive ecosystem based on brine shrimp, which thrive in its waters, and provides critical habitat for two million annual migratory birds that feed on the shrimp and alkali flies (Ephydra hians).
• Sodium hydroxide is a highly corrosive base and alkali that decomposes lipids and proteins at ambient temperatures and may cause severe chemical burns.
• The solid may dissolve unchanged, with dissociation, or with chemical reaction with another constituent of the solution, such as acid or alkali.
• Ununennium's position as the seventh alkali metal suggests that it would have similar properties to its lighter congeners.
• The family moved to Wychbold when his father became manager of the British Alkali Works at Stoke Prior, Worcestershire.
• There he continued his work on molecular-beam reactive dynamics, working with graduate students Sanford Safron and Walter Miller on the reactions of alkali atoms with alkali halides.
• Caesium is an alkali metal and has physical and chemical properties similar to those of rubidium and potassium.
• Petalite is an important ore of lithium, and is converted to spodumene and quartz by heating to ~500 °C and under 3 kbar of pressure in the presence of a dense hydrous alkali borosilicate fluid with a minor carbonate component.
• Examples of substances that are common reducing agents include hydrogen, the alkali metals, formic acid, oxalic acid, and sulfite compounds.
• The elements in period 2 often have the most extreme properties in their respective groups; for example, fluorine is the most reactive halogen, neon is the most inert noble gas, and lithium is the least reactive alkali metal.
• The word lye most accurately refers to sodium hydroxide (NaOH), but historically has been conflated to include other alkali materials, most notably potassium hydroxide (KOH); though, in many cases, potassium hydroxide is also referred as lye.
• The alkali metals combine directly with halogens under appropriate conditions forming halides of the general formula, MX (X = F, Cl, Br or I).
• It occurs with sodalite in syenite xenoliths in an alkali intrusive complex at Mont Saint-Hilaire, Canada.
• Saponification is a process of cleaving esters into carboxylate salts and alcohols by the action of aqueous alkali.

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