Is Hydrogen Sulfide an Acid?
Answer: Aqueous solutions of Hydrogen sulfide (H2S) are acidic. This solution reacts with alkalis such as sodium hydroxide to produce sulphide salts and water and turns blue litmus red.
NaOH +H2S = NaHS + H2O
2NaOH + H2S = Na2S + 2H2O
Hence, hydrogen sulfide is an acid.