- 1
An alkali is a substance that, with an acid, can make a chemical salt. In the school lab, alkalis are the opposite partner of acids: they can cancel an acid’s sharpness, they often feel slippery, and they change the colour of some dyes the other way from acids.
An alkali is a substancealkali是一種物質 that, with an acid跟酸一起 can make a chemical salt可以形成化學上的鹽 In the school lab在學校實驗室裡 alkalis are the opposite partner of acidsalkali是酸的對立夥伴 they can cancel an acid's sharpness它們可以中和酸的刺激性 they often feel slippery摸起來常常滑滑的 and they change the colour of some dyes the other way from acids讓某些染劑變色的方向跟酸相反
Soap-making and strong cleaners use stuff. Scientists also say “base”; alkali is the older chemistry-class word, especially for bases that dissolve in water, such as sodium .
Soap-making and strong cleaners use alkaline stuff做肥皂和強力清潔劑會用到鹼性的東西 Scientists also say 'base'科學家也會說'base'（鹼） alkali is the older chemistry-class wordalkali是化學課上比較舊的說法 especially for bases that dissolve in water特別是指會溶於水的鹼 such as sodium hydroxide像是氫氧化鈉
Do not taste them, even though old books mention a bitter taste.
Do not taste them不要去嚐它們 even though old books mention a bitter taste雖然舊書裡有提到帶苦味
The word comes from Arabic for the ashes of a salty plant (saltwort). People burned the plant and used the ashes to get the stuff they needed.
The word comes from Arabic這個字來自阿拉伯文 for the ashes of a salty plant (saltwort)指一種鹹味植物（saltwort，海蓬子）燒過的灰 People burned the plant人們把這種植物燒掉 and used the ashes to get the alkaline stuff they needed用灰燼取得他們需要的鹼性物質
It is not related to alcohol, though both English words begin with al- from Arabic al-, “the.”
It is not related to alcohol它跟alcohol（酒精）沒有關係 though both English words begin with al- from Arabic al-雖然這兩個英文字開頭的al-都來自阿拉伯文的al- 'the.'也就是「the」的意思
組成From French alcali, from Medieval Latin alcali, from Arabic al-qily, “alkali; ashes,” especially ashes of saltwort, related to a verb for roasting or frying.
同家族的字
- alkalinethe adjective (and related noun) from alkali + -ine
- alkalinityhow alkaline something is
- alkaloidnamed from alkali; a family of plant compounds
原始詞典資料2 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
alkalinoun/ˈæl.kəˌlaɪ/
- 1
chemistrynatural-sciencesphysical-sciencesOne of a class of caustic bases, such as soda, soda ash, caustic soda, potash, ammonia, and lithia, whose distinguishing characteristics are dissolving in alcohol and water, uniting with oils and fats to form soap, neutralizing and forming salts with acids, turning to brown several vegetable yellows, and changing reddened litmus to blue.
- Alkalies may be defined as bodies which combine with acids so as to impair or neutralize their activity, and produce what are called salts. They are distinguished by properties the reverse of acids, and the two classes are generally looked upon as antagonist substances.
- 2
Soluble mineral matter, other than common salt, contained in soils of natural waters.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。