In chemistry, an alkali (/ ˈ æ l k ə l aɪ /; from the Arabic word al-qāly, القالِي) is a basic, ionic salt of an alkali metal or an alkaline earth metal. An alkali can also be defined as a base that …

2025年3月7日 · 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 …

2025年3月28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 …

2023年8月29日 · The alkali metals are a group of elements in the periodic table with similar properties: They are all shiny, silvery-white, highly reactive metals. The alkali metals are …

The alkali metals consist of the chemical elements lithium (Li), sodium (Na), potassium (K), [note 1] rubidium (Rb), caesium (Cs), [note 2] and francium (Fr). Together with hydrogen they …

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 …

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 …

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.

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.

alkali, Inorganic compound, any soluble hydroxide (―OH) of the alkali metals: lithium, sodium, potassium, rubidium, and cesium. More broadly, ammonium hydroxide ( see ammonia ) and …