In chemistry, an alkali (/ ˈælkəlaɪ / ⓘ; from the Arabic word al-qāly, القالِي) is a basic 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 …

alkali, any of the soluble hydroxides of the alkali metals— i.e., lithium, sodium, potassium, rubidium, and cesium. Alkalies are strong bases that turn litmus paper from red to blue; they react with acids to …

The meaning of ALKALI is a soluble salt obtained from the ashes of plants and consisting largely of potassium or sodium carbonate; broadly : a substance (such as a hydroxide or carbonate of an alkali …

Jan 1, 2025 · Alkalis are associated with a group of alkali metals and their compounds. These metals include hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and …

Alkalis are soluble hydroxides of alkali metals, including lithium, sodium, potassium, rubidium, and cesium. These compounds are characterized by their strong basic nature, capable of turning litmus …

The word 'alkali' comes from the Arabic 'qali' meaning 'from the ashes' since ashes mixed with water used as cleaning products (such as soaps) are made of alkali materials. An alkali is where a base is …

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Alkalis are those bases that can dissolve in water, while those that cannot dissolve in water are not alkalis. This means that all bases are not alkaline, except those that can dissolve in water.

5 days ago · alkali (countable and uncountable, plural alkalis or alkalies) (chemistry) One of a class of caustic bases, such as soda, soda ash, caustic soda, potash, ammonia, and lithia, whose …

Jul 1, 2025 · Potassium hydroxide (KOH) and Ammonium hydroxide (NH₄OH) are alkalis. Zinc oxide, magnesium oxide, and aluminum hydroxide are not alkalis as they are insoluble in water.