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Definitions

alkali

[al-kuh-lahy] / ˈæl kəˌlaɪ /
NOUN
soluble base; opposite of an acid
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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The company has one aquamation machine that uses alkali solution, heat and pressure to break down the organic material into ashes.

From Los Angeles Times May 23, 2025

Another Los Angeles Times report on a roundup of immigrants begins by noting, “Human misery was compounded here today by a blistering desert sun and swirls of alkali dust.”

From Salon Sep. 21, 2024

Because a vanadium peroxide molecule is negatively charged, it needed alkali cations for charge balance, Nyman said, and the researchers used potassium, rubidium and cesium alkali cations for this study.

From Science Daily Feb. 12, 2024

As the manhunt for Abdul Shokoor Ezedi continues, what do we know about the suspect in the alkali attack in Clapham, south London?

From BBC Feb. 2, 2024

He drifted past saguaros and alkali flats, camped beneath escarpments of naked Precambrian stone.

From "Into the Wild" by Jon Krakauer

Pots, pans, vats, machines exposed to corrosives will be protected by a skin of aluminum, metal highly resistant to mos.t acids and alkalies.

From Time Magazine Archive

Alkalies also combine with oils, and the less thin and volatile they are, the more easily are they soluble in alkalies.

From Heads of Lectures on a Course of Experimental Philosophy: Particularly Including Chemistry by Priestley, Joseph

An instrument to ascertain the strength of alkalies, or the quantity of alkali in a mixture.

From Webster's Unabridged Dictionary by Webster, Noah

Humic, hū′mik, adj. denoting an acid formed by the action of alkalies on humus or mould.

From Chambers's Twentieth Century Dictionary (part 2 of 4: E-M) by Various

The best antidotes for acids are soda, lime-water, soap-suds, and chalk; for alkalies, weak acids, such as lemons, oranges, vinegar, or cider.

From How to Care for the Insane A Manual for Nurses by Granger, William D.

In addition, the scientists substituted ammonium and tetramethyl ammonium, the former of which is mildly acidic, for the alkalis.

From Science Daily Feb. 12, 2024

Fermenting encompasses a range of processes through which microorganisms — yeasts, molds, bacteria — break down compounds in food to create alcohols, acids or alkalis, which in turn prevent the growth of harmful pathogens.

From Salon Dec. 6, 2023

Coal provided the power; the nascent chemical industry supplied the acids and alkalis essential to these enterprises.

From Nature Aug. 30, 2020

Alkalis were extracted from ashes, and soaps were prepared by combining these alkalis with fats.

From Textbooks Feb. 14, 2019

It is soluble in strong acetic acid, and in caustic alkalis, which latter may be used for the purification of starch in which it is present.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" by Various




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