What is the Valency of Sulphur in SO3? Explained with Examples

Learn the valency of sulphur in SO3 and understand how sulphur forms bonds with oxygen atoms in sulphur trioxide.

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The valency of sulphur in SO3 is +6. In sulphur trioxide (SO3), sulphur forms double bonds with three oxygen atoms. Each oxygen atom has a valency of -2, and since there are three oxygen atoms, the total negative charge is -6. To balance this, sulphur must have a valency of +6.

FAQs & Answers

  1. What is valency in chemistry? Valency is the measure of an atom's ability to combine with other atoms; it is determined by the number of electrons an atom can lose, gain, or share.
  2. How is the valency of sulphur determined in SO3? In SO3, sulphur forms three double bonds with oxygen atoms, each oxygen has a valency of -2, so sulphur has a valency of +6 to balance the molecule’s charge.
  3. What is the oxidation state of sulphur in SO3? The oxidation state of sulphur in sulphur trioxide (SO3) is +6.
  4. Why does sulphur have a valency of +6 in SO3? Because there are three oxygen atoms each with a -2 valency, sulphur must have a +6 valency to balance the total negative charge in SO3.

Watch More

For a deeper understanding of sulphur compounds and their chemical properties, explore related videos on oxidation states, bonding in sulphur dioxide (SO2), and the role of valency in determining molecular structure.

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  3. What Is the Valency of Sulphur: Positive or Negative? Explore the valency of sulphur, its role in compounds, and whether it's positive or negative in various chemical contexts.
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  7. How to Determine the Valency of Sulfur in Different Compounds Learn how to find the valency of sulfur in compounds like H2S, SO2, and H2SO4 by understanding its bonding behavior and periodic table position.
  8. Why Does Sulphur Exhibit Variable Valency? Explained Discover why sulphur has variable valency of +2, +4, and +6 due to its electron configuration and bonding capabilities in chemistry.