General Science • ChemistryMedium
What is the chemical name of washing soda, an important sodium compound used for softening hard water?
A. Sodium bicarbonate
B. Sodium carbonate decahydrate✓ Correct Answer
C. Sodium chloride
D. Sodium hydroxide
💡 Solution & Explanation
Washing soda is chemically known as sodium carbonate decahydrate with the formula Na2CO3 dot 10H2O. Sodium bicarbonate is baking soda, which acts as an antacid and baking agent. Sodium hydroxide is caustic soda, used in soap making. Water hardness is removed when carbonate ions precipitate calcium and magnesium ions.
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