2 NaI (aq) + 2 NaNO3 (aq) + 2 H2SO4 (aq) → 2 Na2SO4 (aq) + I2 (s) + 2 NO2 (l) + 2 H2O (l)
This is an oxidation-reduction (redox) reaction:
2 I-I - 2 e- → 2 I0 (oxidation)
2 NV + 2 e- → 2 NIV (reduction)
NaI is a reducing agent, NaNO3 is an oxidizing agent.
This is a precipitation reaction: I2 is the formed precipitate.
Reactants:
Products:
- Na2SO4
- I2
- NO2 – Nitrogen dioxide
- Other names: Nitrogen(IV) oxide , Deutoxide of nitrogen , Nitrogen peroxide
- Appearance: Brown gas ; Reddish-brown gas or brown or yellow liquid with pungent odour ; Yellowish-brown liquid or reddish-brown gas (above 70°F) with a pungent, acrid odor. [Note: In solid form (below 15°F) it is found structurally as N2O4.]
- H2O – Water, oxidane