What is the chemical formula of washing soda?
Answer and explanation
Correct answer: D. Na2CO3.10H2O
- Step 1: Washing soda is hydrated sodium carbonate, with ten molecules of water of crystallisation: Na2CO3.10H2O. Answer: Na2CO3.10H2O. Why not the others: NaHCO3 is baking soda, NaOH is caustic soda, and CaCO3 is limestone or marble.
Practise more Chemistry: matter, reactions and carbon compounds.
Free questions with an explanation for every one, and full timed SEE (Secondary Education Examination, Nepal) mock tests.
More Chemistry: matter, reactions and carbon compounds questions
- What is the chemical formula of common salt?
- Which gas is released when zinc reacts with dilute hydrochloric acid?
- What is the atomic number of an atom that has 6 protons and 8 neutrons?
- What is the molar mass of water, H2O? (H = 1, O = 16)
- How many moles are present in 44 g of carbon dioxide, CO2? (C = 12, O = 16)
- What is the pH of a neutral solution at room temperature?