Question

Which amongst the following is the formula of bisulphate ion?

• A. $S{O}_4{}^{2-}$
• B. $S{O}_3{}^{2-}$
• C. $HS{O}_4{}^{-}$
• D. $HS{O}_3{}^{-}$

Answer 1

The correct option is C $HS{O}_4{}^{-}$

The bisulphate ion is a polyatomic anion whose formula is$HS{O}_4{}^{-}$. Therefore, bisulphate ion contains hydrogen, sulphur and oxygen atoms. The formula of sulphate, sulphite, bisulphate and bisulphite ions are given below in the table.
$$\begin{array}{ccc}\text{Ion}& \text{Formula}& \text{Charge}\\ \text{Sulphate}& S{O}_4{}^{2-}& \text{-3}\\ \text{Sulphite}& S{O}_3{}^{2-}& \text{-1}\\ \text{Bisulphate}& HS{O}_4{}^{-}& \text{-3}\\ \text{Bisulphite}& HS{O}_3{}^{-}& \text{-2}\end{array}$$