Definition

1. Noun:
   • Slaked lime powder / Hydrated lime powder: A fine, white powder produced by adding water to quicklime (calcium oxide). It is chemically calcium hydroxide. It is used in construction, agriculture, and traditional practices.

Usage Examples

• Noun:
  • Người thợ xây trộn vôi bột với cát và nước để tạo vữa. (The mason mixes slaked lime powder with sand and water to make mortar.)
  • Vôi bột được rải xuống đất để cải tạo độ chua. (Slaked lime powder is spread on the soil to amend acidity.)
  • Trong ăn trầu, người ta dùng một chút vôi bột. (In betel chewing, a little slaked lime powder is used.)

Advanced Usage

• The term is a compound noun. In technical or industrial contexts, it is directly equivalent to the chemical compound "calcium hydroxide" (Ca(OH)₂).

Variants and Related Words

• Vôi sống (n): Quicklime, calcium oxide (CaO). The unhydrated, reactive form before being turned into .
• Vôi tôi (n): Another common term for slaked or hydrated lime, essentially synonymous with , emphasizing the process of "slaking" (tôi) with water.

Synonyms

• Hydrated lime: The standard industrial term.
• Slaked lime: A common synonym.
• Calcium hydroxide: The precise chemical name.

Notes on Usage

• "Vôi bột" specifically refers to the dry, powdered form. If it is mixed with water to form a paste, it may be called vôi nước (limewash) or vôi nhuyễn (lime putty).
• It is important not to confuse it with bột vôi, which could ambiguously refer to powdered limestone (calcium carbonate) or powdered quicklime, depending on context. Vôi bột unambiguously means the hydrated powder.