The color change of sodium carbonate solution and hydrogen sulfide reaction
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Does the color of sodium carbonate solution change when it reacts with hydrogen sulfide? When I passed hydrogen sulfide gas into the sodium carbonate solution, a dark green color appeared. I don’t know if this is normal? ? ?
There should be no change. It may indeed contain corrosion products, iron, etc.
It should be that sodium carbonate reacts with hydrogen sulfide to form sodium hydrogen sulfide, and sodium hydrogen sulfide is further oxidized into sodium sulfite and sodium sulfate, the color of sodium sulfate 7-hydrate.