Final answer:
The formula for hydrosulfuric acid is H₂S, a weak diprotic acid formed when hydrogen sulfide dissolves in water, producing basic solutions.
Step-by-step explanation:
The formula for hydrosulfuric acid is H₂S. This compound is a result of hydrogen sulfide dissolving in water. Hydrogen sulfide is a weak diprotic acid and its aqueous solutions can undergo a two-stage ionization process.
In the first stage, hydrogen sulfide ions (HS−) are formed, and in the second stage, sulfide ions (S₂−) are produced. When dissolved in water, it forms hydrosulfuric acid which displays basic properties due to the formation of hydroxides upon dissociation.