2NaNO2 + 2FeSO4 + 2H2SO4 → Fe2(SO4)3 + 2NO + Na2SO4 + 2H2O
Sodium nitrite react with iron(II) sulfate and sulfuric acid to produce iron(III) sulfate, nitric oxide, sodium sulfate and water. Sodium nitrite and iron(II) sulfate - solid. Sulfuric acid - diluted solution.