nước mềm
Definition
- Noun:
- Soft water: Water that contains low concentrations of calcium and magnesium ions, or is free from these hardness-causing minerals. It lathers easily with soap.
Usage Examples
- Noun:
- Nước mưa là một thứ nước mềm. (Rainwater is a type of soft water.)
- Nước mềm tốt hơn cho máy giặt của bạn. (Soft water is better for your washing machine.)
- Khu vực này có nguồn nước mềm tự nhiên. (This area has a natural source of soft water.)
Advanced Usage
- In technical contexts, "nước mềm" specifically refers to water that has been treated or is naturally occurring with a hardness below a certain threshold, often measured in grains per gallon (GPG) or milligrams per liter (mg/L) of calcium carbonate.
Variants and Related Words
Nước cứng (n): Hard water. Water with high mineral content, primarily calcium and magnesium.
- Nước cứng có thể để lại cặn trong ấm đun. (Hard water can leave scale in kettles.)
Làm mềm nước (v): To soften water. The process of removing calcium and magnesium ions from water.
- Chúng tôi cần lắp đặt hệ thống làm mềm nước. (We need to install a water softening system.)
Synonyms
- Softened water: Water that has been treated to remove hardness minerals.
- Demineralized water (in specific contexts): Water from which mineral ions have been removed.
Related Concepts
- Water hardness: A measure of the concentration of multivalent cations, primarily calcium (Ca²⁺) and magnesium (Mg²⁺), in water.
- Ion exchange: A common process for producing soft water, where hardness ions are exchanged for sodium or potassium ions.