1. Hydrogen sulfate ion (HSO₄⁻): This is the anion formed when sulfuric acid (H₂SO₄) loses one proton (H⁺).
2. The conjugate acid of hydrogen sulfate ion (H₂SO₄): This is sulfuric acid itself, which is a diprotic acid.
Let's analyze each case:
* Hydrogen sulfate ion (HSO₄⁻): This ion has a valency of -1. It carries a negative charge, indicating it can accept one electron or form one covalent bond to achieve stability.
* Sulfuric acid (H₂SO₄): This molecule has a valency of 0. It is neutral and does not carry any charge. However, it can donate two protons (H⁺) to form two covalent bonds.
Therefore, the valency of "hydrogen sulphate" depends on which specific species you are referring to. It can be -1 for the hydrogen sulfate ion or 0 for sulfuric acid.
