What is the chemical formula for hydrogen sulfate?

Hydrogen sulfate is scientifically referred to as bisulfate, and its chemical formula is HSO4-. This formula indicates that it contains one hydrogen atom, one sulfur atom, and four oxygen atoms. The presence of the hydrogen atom signifies that it is an acid form of the sulfate ion, which is SO4^2-. In this context, hydrogen sulfate can act as a weak acid that can donate a proton, which is a characteristic feature of acids. The other choices represent different ions or compounds: SO4^2- is the sulfate ion itself without the hydrogen, HSO3- is the bisulfite ion, and CN- is the cyanide ion, none of which correspond to hydrogen sulfate. Thus, the correct designation for hydrogen sulfate is indeed HSO4-.