Definition

Noun: * A white, crystalline sodium salt of carbonic acid (sodium carbonate decahydrate, Na₂CO₃·10H₂O), used primarily as a cleaning agent, water softener, and in various industrial processes.

Usage

"Washing soda" is an uncountable noun. It refers to the chemical compound itself, not individual pieces. It is commonly used in household cleaning and laundry contexts.

Examples

• For laundry: "Add a tablespoon of washing soda to your laundry detergent to boost its cleaning power and soften hard water."
• For cleaning: "A solution of washing soda and warm water is effective for cutting through grease on kitchen surfaces."
• General use: "You can find washing soda in the laundry aisle of most supermarkets."

Advanced Usage

• Chemical reagent: In chemistry or industry, "washing soda" may be referred to more formally as when discussing its specific crystalline form and properties.
  • Example: "The experiment required the use of anhydrous sodium carbonate, not washing soda, which contains water of crystallization."

Variants and Related Words

• Soda crystals: A common British English synonym for "washing soda."
• Sodium carbonate: The scientific name for the chemical compound. "Washing soda" specifically refers to the decahydrate form (Na₂CO₃·10H₂O).
• Baking soda (sodium bicarbonate): A different, though related, compound (NaHCO₃) used in baking and as a mild cleaner. It is not interchangeable with washing soda.

Synonyms

• Sodium carbonate decahydrate
• Soda crystals (primarily UK)
• Sal soda

Important Note

Washing soda is not the same as baking soda. They are distinct chemical compounds with different properties and uses. Washing soda (sodium carbonate) is a stronger alkali and is primarily a cleaning agent, while baking soda (sodium bicarbonate) is milder and used in baking, as a deodorizer, and for gentle cleaning.

Noun

1. a sodium salt of carbonic acid; used in making soap powders and glass and paper