In binary-acid nomenclature, what is hydrosulfuric acid?

• A. $H_2{S}_{O_4}$ (aq), sulfuric acid
• B. $HS$ (aq), hydrosulfuric acid
• C. $H_{2}S$ (aq), aqueous hydrogen sulfide
• D. $HSO{3}_{\mathrm{}}$ (aq), sulfurous acid

Answer: (C)

Verified step by step guidance

1. Understand that binary acids are acids composed of hydrogen and one other nonmetal element, without oxygen.
2. Recognize that the name 'hydrosulfuric acid' refers to a binary acid containing hydrogen and sulfur only, with no oxygen atoms.
3. Identify the chemical formula for hydrosulfuric acid as \(\mathrm{H_2S}\), which is aqueous hydrogen sulfide.
4. Distinguish hydrosulfuric acid from oxyacids like sulfuric acid (\(\mathrm{H_2SO_4}\)) and sulfurous acid (\(\mathrm{H_2SO_3}\)), which contain oxygen.
5. Conclude that hydrosulfuric acid corresponds to \(\mathrm{H_2S}\) (aq), aqueous hydrogen sulfide.