What is the chemical name of washing soda?
Answer and explanation
Correct answer: Sodium carbonate decahydrate
Washing soda is the hydrated salt sodium carbonate decahydrate, represented by Na₂CO₃·10H₂O. The term “decahydrate” means that each formula unit of sodium carbonate is associated with ten molecules of crystallisation water. It is used in laundry and for removing the hardness of water. Sodium hydrogen carbonate is baking soda, sodium chloride is common salt, and calcium sulphate hemihydrate is Plaster of Paris; hence option A is correct.
Frequently asked questions
What is the correct answer to this question?
Sodium carbonate decahydrate
Why is this the correct answer?
Washing soda is the hydrated salt sodium carbonate decahydrate, represented by Na₂CO₃·10H₂O. The term “decahydrate” means that each formula unit of sodium carbonate is associated with ten molecules of crystallisation water. It is used in laundry and for removing the hardness of water. Sodium hydrogen carbonate is baking soda, sodium chloride is common salt, and calcium sulphate hemihydrate is Plaster of Paris; hence option A is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
