Why Is the Valency of SO3 Equal to 2? Explained
Learn why the valency of sulfur trioxide (SO3) is 2, including electron sharing and bonding in SO3 molecules.
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SO3 valency is 2 because sulfur in sulfur trioxide (SO3) has six valence electrons and forms three double bonds with oxygen atoms. Each oxygen has six valence electrons, contributing two non-bonding pairs and sharing two electrons with sulfur. The three double bonds mean sulfur shares six electrons with oxygen atoms, giving sulfur an effective valency of 6. However, for the molecule SO3 in chemical reactions, the effective valency is considered 2 due to its ability to form ionic compounds with common valency of 2.
FAQs & Answers
- What is the valency of sulfur in SO3? In sulfur trioxide (SO3), sulfur has an effective valency of 6 due to sharing six electrons with oxygen atoms, but the common valency considered for reactions is 2.
- How does sulfur bond with oxygen in SO3? Sulfur forms three double bonds with oxygen atoms in SO3, sharing electrons to satisfy valence requirements.
- Why is SO3 valency considered 2 despite sulfur having six valence electrons? Although sulfur shares six electrons in SO3, its valency is considered 2 because it commonly forms ionic or covalent compounds reflecting a valency of 2 in many chemical reactions.
- What is the electron configuration of SO3? SO3 consists of sulfur bonded to three oxygen atoms through double bonds, with sulfur sharing six electrons and each oxygen contributing to fulfilling the octet rule.