Why Does Sulphur Exhibit Variable Valency? Explained with Examples

Discover why sulphur has variable valency due to its vacant d-orbitals and its ability to form compounds with valencies of -2, +2, +4, and +6.

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Sulphur has variable valency due to its ability to expand its octet by using vacant d-orbitals. In addition to forming compounds where it exhibits a valency of +2, +4, or +6, sulphur can also display a valency of -2 in its sulfide form. This flexibility allows sulphur to form a variety of compounds, enabling it to participate in both oxidation and reduction reactions effectively.

FAQs & Answers

  1. What causes sulphur to have variable valency? Sulphur exhibits variable valency because it can expand its octet by utilizing vacant d-orbitals, allowing it to form multiple oxidation states such as -2, +2, +4, and +6.
  2. What are the common valency states of sulphur in compounds? Sulphur commonly shows valency states of -2 in sulfides, +2, +4, and +6 in various oxide and other compounds.
  3. How does sulphur’s variable valency affect its chemical behavior? Sulphur’s variable valency enables it to participate effectively in both oxidation and reduction reactions, forming a wide variety of compounds with diverse chemical properties.