In chemistry, an alkali (/ ˈælkəlaɪ /; 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 Group 1 metals have a particular name: the alkali metals. This is due to the formation of alkali (basic) solutions upon their reaction with water. Table 3.1.3 3.1. 3.1 lists the derivation of the names of the alkali metals. Table 3.1.3 3.1. 3.1: Derivation of the names of each of the alkali metal elements.

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.

An alkali is where a base is dissolved in water. Often it is the salt of an Alkali metal. An alkali is the opposite to an acid and can be neutralized (brought down to pH seven) by adding acid. It feels soapy. It is corrosive (it can burn your skin away). The higher the number is over seven on the pH scale the stronger the alkali is.

Alkali metal, any of the six elements of Group 1 (Ia) of the periodic table—lithium, sodium, potassium, rubidium, cesium, and francium. The alkali metals are so called because reaction with water forms alkalies (i.e., strong bases capable of neutralizing acids).

2025年1月1日 · Alkalis are substances with unique properties that play a vital role in chemical processes, both in everyday life and in industrial settings alike.

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.

2017年11月22日 · Alkali metals are the group 1 metals of the periodic table whereas alkaline earth metals are in the group 2. The main difference between alkali and alkaline is that alkali metals have one valence electron whereas alkaline earth metals have two valence electrons. 1. What is Alkali. 2. What is Alkaline. 3.

What are the Alkali Metals? The word “alkali” comes from Arabic, meaning “ashes of the saltwort”. In chemistry, it refers to a base that can dissolve in water. The alkali metals are all members of group 1 on the periodic table, minus hydrogen. This is the first column of the periodic table. They include lithium, sodium, potassium, etc.