Alkali - Wikipedia
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 | Chemical Compound, Properties & Uses | Britannica
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 …
Alkali Definition & Meaning - Merriam-Webster
alkali. noun. al· ka· li ˈal-kə-ˌlī. plural alkalies or alkalis. 1. : 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 compare base sense 6a. 2. : alkali metal. 3.
Alkali metal | Definition, Properties, & Facts | Britannica
2024年9月17日 · 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).
Acids and Alkalis - BBC Bitesize
Acids and alkalis are common in daily life. They are found in the home, in our bodies, in industry, car batteries and school science labs. One of the jobs of a chemist is to tell the difference...
Alkali vs Base- Definition, 7 Key Differences, Examples - Science Info
2021年2月24日 · Alkali is a basic soluble hydroxide of alkali metals or alkaline earth metals. The base is a chemical compound that reacts with acids to produce salts. Solubility. Alkalis dissolve in water to produce OH-. Bases do not dissolve in water. Relation.
Alkali - Simple English Wikipedia, the free encyclopedia
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 neutralised (brought down to pH 7) by adding acid.
Alkali - Encyclopedia.com
2018年5月14日 · alkali (ăl´kəlī) [Arab., al-gili=ashes of saltwort], hydroxide [1] of an alkali metal [2]. Alkalies are readily soluble in water and form strongly basic solutions with a characteristic acrid taste. They neutralize acids, forming salts and water.
Characteristics of alkali metals | Britannica
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.
3.1: The Alkali Metal Elements - Chemistry LibreTexts
Many of the physical properties of the alkali metals (Table 3.1.3 3.1. 3.4) are typical of metals, e.g., thermal and electrical conductivity. However, due to the relatively weak inter-atomic forces (weak M-M bonding) they are soft and readily cut with a knife. Element.