alkali

英 ['ælkəlaɪ] 美['ælkə'lai]

TEM8IELTSGRE扩展词汇

复数: alkalis;

alkali 碱

来自阿拉伯语al-qaliy. al, 定冠词。qaliy, 灰，碱灰。

alkali: alkali: [14] English acquired alkali via Latin from Arabic al-qalīy ‘the ashes’, a derivative of the verb qalay ‘fry’. The implicit reference is to the plant saltwort (Latin name Salsola kali), which was burnt to obtain its alkaline ashes (Chaucer’s canon’s yeoman, the alchemist’s assistant, mentions it: ‘Salt tartre, alcaly, and salt preparat, And combust matieres, and coagulat’, 1386). The modern chemical sense of a compound which combines with an acid to form a salt was first used in 1813, by the chemist Sir Humphry Davy.
alkali (n.): late 14c., "soda ash," from Medieval Latin alkali, from Arabic al-qaliy "the ashes, burnt ashes" (of saltwort, a plant growing in alkaline soils), from qala "to roast in a pan." The modern chemistry sense is from 1813.

1. AAR can be assorted two classifications: Alkali - Silica Reaction ( ASR ) and Alkali - Carbonate Reaction ( ACR ).: AAR主要分两类: 碱 - 硅酸反应(Alkali-Silica Reaction, 简称 ASR ) 和碱 - 碳酸盐反应 ( Alkali-CarbonateReaction,简称ACR ).

2. Alkali - aggregate reaction ( AAR ) is one of significant factors affecting durability of concrete structures.: 碱 - 集料反应 ( Alkali-Aggregate Reaction,AAR ) 是影响混凝土耐久性的重要因素.

3. The valence atom of an alkali - metal atom has two states.: 碱金属原子的价原子具有两种能态.

4. Such detergents do not yellow the wool as alkali tends to do.: 这种洗涤剂不会象碱那样使羊毛发黄.

5. All the alkali metals have a single s - electron outside a closed shell.: 所有的碱金属都在闭合壳层之外有一单个S电子.