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  • Why is the bond order in the SO₃ molecule 1. 33 and not 2?
    15 $\ce {SO3}$ molecule has three double bonded oxygen to the central sulfur atom Sulfur has $\ce {sp^2}$ hybridization and it has 6 outer electrons which make the bonds with the oxygen So shouldn't the bond order be 2?
  • Is SO3 an ion or a molecule? - Chemistry Stack Exchange
    For one thing, $\ce {SO3^ {2-}}$ has two extra electrons, so it's an ion $\ce {SO3}$ is a neutral molecule There are a different number of electrons, so they're just different
  • How is sulphur trioxide formed and why is it stable?
    Closed 7 years ago Structure of $\ce {SO3}$ (sulfur trioxide): In the molecule, if each oxygen atom shares two electrons with sulfur atom then how does the sulfur atom remain stable? It already has 6 valence electrons and needs only 2 more to become stable but the oxygen atoms share total of 6 electrons with sulfur atom So how is the molecule
  • Mechanism of sulfur trioxide reaction with water to make sulfuric acid
    $\ce {SO3}$ is a strong electrophile, enough to react quickly with water, which is a relatively weak nucleophile A water molecule is added to the structure, facilitated by the dislocation of a $\ce {S=O}$ bonding electron pair in $\ce {SO3}$ to the oxygen atom, forming the intermediate structure shown
  • How to shift SO3 SO2 equilibrium? - Chemistry Stack Exchange
    In this case, if I want to decrease the amount of $\ce {SO3}$, I need to shift the equilibrium to the left, meaning that I need to decrease the concentration of $\ce {SO3}$ Based on my understanding of Le Chatelier's principle, changing the temperature will have the opposite effect on the equilibrium because the reaction is exothermic
  • Bents rule for Sulfur trioxide and Sulfur dioxide
    Here, in $\ce {SO3}$, we have no lone pairs on the sulfur atom whereas, in $\ce {SO2}$, the central atom has a pair of lone electrons According to Bent's rule, the lone pairs tend to occupy the orbital with more s-character which in turn decreases the s-character in the $\ce {S-O}$ bonds and increases the p-character
  • acid base - The contact process - Chemistry Stack Exchange
    The explanation is kinetics $\ce {SO3}$ reacts with water producing fumes of sulfuric acid On the contrary it is dissolved into sulfuric acid without fumes, producing oleum This is why sulfuric acid is used in practice instead of water for absorbing $\ce {SO3}$ produced in the contact process
  • Why is the boiling point of SO3 greater than NH3?
    $\ce {SO3}$ boiling point is $318 $ K, while $\ce {NH3}$ boils at $240$ K The difference is only $78$ K = $32$ % of the lowest value It is surprisingly low, when considering the difference in molar mass : ($80$ g mol vs $17$ g mol) So $80$ is $4 7$ times higher than $17$ $4 7$ times higher !
  • Why does the conversion of SO₂ to SO₃ require high pressure?
    The conversion of sulfur dioxide to sulfur trioxide in the contact process for the manufacture of sulfuric acid requires the following condition: Temperature: 450 degrees Pressure: 1-2 atm, althoug
  • Is the S–O bond strength in sulfur trioxide or sulfite anion larger?
    Can you please explain the difference between the bond enthalpies in sulfurtrioxide $\\ce{SO3}$ and the sulfite anion $\\ce{SO3^{2-}}$?





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