Final answer:
The IUPAC name for washing soda is sodium carbonate, with the chemical formula Na2CO3. It is used in laundry to enhance detergent efficiency.
Step-by-step explanation:
The IUPAC name for washing soda, which is produced in the Solvay process, is sodium carbonate. Washing soda is commonly used in laundry to interact with ions in water that may reduce the efficiency of detergents. The chemical formula for sodium carbonate is Na2CO3.