Sodium sulfite was dissolved in dilute sulfuric acid. The evolved colorless gas was dissolved in water
| August 5, 2021 | education
Sodium sulfite was dissolved in dilute sulfuric acid. The evolved colorless gas was dissolved in water and through the resulting solution, passed the gas formed by dissolving zinc sulfide in hydrochloric acid. The precipitate was filtered off and dissolved in concentrated nitric acid. Write the equation for the four reactions described.
Na2SO3 + H2SO4 = Na2SO4 + H2O + SO2
(during the reaction, sulfurous acid is formed, but it is unstable and immediately decomposes into sulfur dioxide and water)
ZnS + 2HCl = ZnCl2 + H2S
SO2 + 2H2S = 3S + 2H2O
Sulfur can react with nitric acid in different ways depending on the conditions and concentration of the acid:
S + 6HNO3 = H2SO4 + 6NO2 + 2H2O
S + 2HNO3 = H2SO4 + 2NO
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