Question

Which one of the following products is formed when a mixture of steam, sulphur dioxide gas and oxygen gas (from air) is passed over dry lumps of common salt, the sodium chloride?

• A. Na2SO3
• B. Cl2
• C. NaHSO3
• D. Na2SO4

Answer 1

Answer: (D)

Na2SO4

Answer 2

Hargreaves process.

4NaCl (s) + 2SO2 (g) + 2H2O (g) + O2 (g) $\longrightarrow$2Na2SO4 + 4HCl