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  • Why is the bond order in the SO₃ molecule 1. 33 and not 2?
    The bonding situation in $\ce{SO3}$ is a tough nut to understand In a historical context this molecule belongs to the species of hypervalent molecules, that disobey the octet rule The concept of hypervalence is still very much debated Recently there was a question raised by ron, seeking for more guidance: Hypervalency and the octet rule
  • Is SO3 an ion or a molecule? - Chemistry Stack Exchange
    Earlier I thought that $\ce{SO3^{2-}}$ (sulfite) is an ion with -2 charge but today I read on internet $\ce{SO3}$ (sulfur trioxide) is a molecule with no charge How can this be possible? Please explain knowing that I am only a student of 10th standard (use normal chemistry concepts as far as possible)
  • 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
  • Is the electrophile in sulfonation of benzene SO3 or SO3H+?
    The cationic intermediate can also be formed by the protonation of sulfur trioxide, $\ce{SO3}$, and another way to do sulfonations is to use concentrated sulfuric acid with $\ce{SO3}$ added These solutions have the industrial name oleum It is possible that the sulfonating agent in all these reactions is not protonated $\ce{SO3}$ but $\ce{SO3
  • Mechanism of sulfur trioxide reaction with water to make sulfuric acid
    $$\ce{SO3 (aq) + 3H2O (l) -> SO4^2- (aq) + 2H3O+ (aq)}$$ $\ce{SO3}$ 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
  • How is sulphur trioxide formed and why is it stable?
    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 stable?
  • Sulfur trioxide structure - Chemistry Stack Exchange
    What resonance structure is the most abundant in sulfur trioxide: the one with one double and two single, the one with two double and one single or the one with all three double bonds?
  • Why is the boiling point of SO3 greater than NH3?
    I understand that SO3 has a greater molar mass (80g mol) than NH3 (17g mol), but would this fully explain the difference in boiling point? Especially considering that there are hydrogen bonds in NH3? Also just a question if anyone knows comparatively how much smaller is a dispersion force in comparison to dipole dipole hydrogen bonds
  • Half-equations for the combustion of sulfur dioxide
    Orthocresol already sufficiently pointed out, that half-reactions are a book-keeping tool for electrons When talking about electrolysis there might be coincidental overlap between half-reactions and the overall mechanism, but as the wording is supposed to indicate, this is not necessarily true
  • 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





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