In chemistry, an alkali (/ ˈ æ l k ə l aɪ /; from the Arabic word al-qāly, القلوي) 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.

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 yield neutral salts; and they are caustic …

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 metal) having marked basic properties. How to use alkali in a sentence.

alkali metal, any of the six chemical elements that make up Group 1 (Ia) of the periodic table —namely, lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). The alkali metals are so called because reaction with water forms alkalies (i.e., strong bases capable of neutralizing acids).

2023年8月29日 · Alkali metals are the six different chemical elements found in the first column of the periodic table: lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs) and francium (Fr).

2021年2月24日 · Alkali is a basic soluble hydroxide of alkali metals or alkaline earth metals. Base is a chemical compound that reacts with acids to produce salts.

Acids and bases can neutralise each other. A base that can dissolve in water is also called an alkali. them. Bases are usually: Many bases are insoluble - they do not dissolve in water. However,...

2025年1月1日 · Alkalis are highly reactive and corrosive, capable of breaking down organic materials easily. Common alkalis include sodium hydroxide, potassium hydroxide, calcium hydroxide, and ammonium hydroxide. Alkalis have diverse applications, ranging from soap making to industrial cleaning, food processing, and water treatment. What Is a Base?

alkali, Inorganic compound, any soluble hydroxide (―OH) of the alkali metals: lithium, sodium, potassium, rubidium, and cesium. More broadly, ammonium hydroxide (see ammonia) and soluble hydroxides of the alkaline earth metals are also called alkalies.

What is an Alkali? An alkali is a basic hydroxide or ionic salt of an alkali metal or alkaline earth metal element, which is soluble in water. Only few alkalis are known, examples, sodium hydroxide (NaOH), potassium hydroxide (KOH), calcium hydroxide (Ca (OH) 2), calcium carbonate (CaCO 3), and magnesium hydroxide (Mg (OH)2.