vôi tôi
Definition
- Noun:
- Slaked lime / Hydrated lime: A fine, white, dry powder produced by adding water to quicklime (calcium oxide). It is chemically calcium hydroxide, used in construction, agriculture, and traditional practices.
Usage Examples
- Noun:
- Thợ xây trộn vôi tôi với cát và nước để tạo vữa. (The mason mixes slaked lime with sand and water to make mortar.)
- Vôi tôi được dùng để cải tạo đất chua. (Slaked lime is used to improve acidic soil.)
- Trong ăn trầu, người ta thường dùng một ít vôi tôi. (In betel chewing, people often use a little slaked lime.)
Advanced Usage
- Chemical Process: The term "tôi" (to slake) in "vôi tôi" specifically refers to the exothermic chemical reaction of water with quicklime ("vôi sống").
- Quá trình tôi vôi tỏa rất nhiều nhiệt. (The lime slaking process releases a great deal of heat.)
Variants and Related Words
- Vôi sống (n): Quicklime / Calcium Oxide. The unslaked, reactive form before water is added.
- Vôi sống rất nguy hiểm khi tiếp xúc với nước. (Quicklime is very dangerous when it comes into contact with water.)
- Vữa vôi (n): Lime mortar. A mixture of slaked lime, sand, and water.
- Ngôi nhà cổ được xây bằng vữa vôi. (The old house was built with lime mortar.)
Synonyms
- Calcium hydroxide: The chemical name.
- Hydrated lime: An industrial term.
- Builder's lime: A common term in construction.
Notes on Usage
- "Vôi tôi" is a specific technical and traditional term. In everyday conversation, it is often shortened to simply "vôi", with the context indicating the type. For example, "mua vôi về quét tường" (buy lime to whitewash the wall) implies slaked lime.
- It is distinct from "vôi bột" (powdered limestone or calcium carbonate), which is a different compound.