H2S is acidic while water is neutral why?

1 Answer
anor277
Sep 25, 2017

An aqueous solution of hydrogen sulfide is weakly acidic.....

Explanation:

In aqueous solution, #H_2S# undergoes the acid base equilibrium....

#H_2S(aq) + H_2O(l) rightleftharpoonsHS^(-) +H_3O^+#

Where #pK_a=6.9#....

It has an exceptionally foul odour, and sulfur chemists would not win popularity contests in their Chemistry departments.

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