2 NaCl (aq) + 2 H2SO4 (aq) → Na2SO4 (aq) + SO2 (aq) + Cl2 (g) + 2 H2O (l)
This is an oxidation-reduction (redox) reaction:
SVI + 2 e- → SIV (reduction)
2 Cl-I - 2 e- → 2 Cl0 (oxidation)
H2SO4 is an oxidizing agent, NaCl is a reducing agent.
This is a gas evolution reaction, Cl2 is the formed gas.
Reactants:
Products:
- Na2SO4
- SO2 – Sulfur dioxide
- Other names: Sulfurous anhydride , Sulphur dioxide , Sulfurous acid anhydride
- Appearance: Colorless gas ; Colourless gas or compressed liquefied gas with pungent odour ; Colorless gas with a characteristic, irritating, pungent odor. [Note: A liquid below 14°F. Shipped as a liquefied compressed gas.]
- Cl2
- H2O – Water, oxidane