What is the chemical formula of Washing Soda?
A) NaCl
B) NaHCO₃
C) Na₂CO₃
D) CaCO₃
Correct Answer: C) Na₂CO₃
Explanation: Washing soda, also known as sodium carbonate, has the chemical formula Na₂CO₃. It is commonly used in household cleaning products and is effective in removing grease, oil, and stains due to its alkalinity.
- A) NaCl: This is the formula for common table salt, not washing soda.
- B) NaHCO₃: This is sodium bicarbonate (baking soda), which is different from washing soda.
- D) CaCO₃: This is calcium carbonate, commonly found in chalk and limestone, not washing soda.
The correct chemical composition of washing soda, Na₂CO₃, reflects two sodium (Na) atoms, one carbon (C) atom, and three oxygen (O) atoms. It can also be found in its hydrated form as Na₂CO₃·10H₂O (sodium carbonate decahydrate).