alkali
/ˈælkəlaɪ/ (bre, ipa) · /ˈælkəlaɪ/ (ame, ipa) · /ˈal-kə-ˌlī/ (ame, mw)
alkali — 名詞
- alkalisingular
- alkaliesplural
1. a basic chemical that can cancel out an acid and leaves water above pH 7
鹼
能中和酸的鹼性物質
a basic chemical that can cancel out an acid and leaves water above pH 7
Jiwoo used litmus paper to check whether the cleaner contained alkali.
Jiwoo 用石蕊試紙檢查那個清潔劑裡是否含有鹼。
alkali in household cleaner
After the leak, alkali was poured onto the floor to stop the acid.
發生外漏後，地板上被倒了鹼來中和酸。
passive: alkali was poured
In science class, Nila learned that soap forms when fat reacts with alkali.
Nila 在自然課上學到，油脂和鹼反應時會形成肥皂。
A strong alkali burned a hole in Abigail's rubber glove.
強鹼在 Abigail 的橡膠手套上燒出了一個洞。
Bao stored the alkali in a locked cabinet beside the test tubes.
Bao 把鹼放在試管旁的上鎖櫃子裡。
- base
broader chemistry term; some bases are not soluble in water and are not called alkalis
- lye
much narrower everyday term for a strong caustic alkali such as sodium hydroxide
- alkaline substance
descriptive phrase rather than a fixed technical noun
- acid
opposite side of the acid-base scale
文法句型
an alkali
strong / weak alkali
alkali in solution
用法筆記
Mostly used in chemistry, cleaning, and manufacturing. Compared with the broader word 'base', 'alkali' usually refers to a base that dissolves in water and makes an alkaline solution.
常見錯誤
2. harmful soluble salts in dry soil that make farming difficult
鹽鹼土
乾旱地區傷害作物的含鹽土壤
harmful soluble salts in dry soil that make farming difficult
After years without rain, alkali spread across the field in white patches.
多年沒下雨後，田裡的鹽鹼土一塊塊泛白。
white patches in dry fields
The farmer planted barley because the soil's alkali killed the tomato crop.
農夫改種大麥，因為地裡的鹽鹼讓番茄整片死掉。
Engineers flushed the land with fresh water to wash out the alkali.
工程人員用淡水沖洗土地，好把裡面的鹽鹼沖出去。
Ayana tested the dusty soil after alkali stopped the young trees from growing.
Ayana 測試那片乾土，因為鹽鹼讓幼樹長不起來。
Cracks appeared where alkali had dried on the edge of the empty pond.
乾掉的鹽鹼在空池邊緣留下了一道道裂紋。
- salt build-up
plain-language description of what happens in the soil, rather than a technical noun
- saline soil
related farming term that focuses on the condition of the land rather than the salt material itself
文法句型
alkali in the soil
wash out alkali
high alkali levels
用法筆記
Used mainly in farming and soil science. In this sense, the word refers to the harmful salt problem in the ground, not to a lab chemical kept in a bottle.