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英文字典中文字典相關資料:
  • 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
  • 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 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
  • Is the electrophile in sulfonation of benzene SO3 or SO3H+?
    A great deal of work has been done on the mechanism, chiefly by Cerfontain and co-workers Mechanistic study is made difficult by the complicated nature of the solutions Indications are that the electrophile varies with the reagent, though $\ce {SO3}$ is involved in all cases, either free or combined with a carrier
  • 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
  • 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
  • Sulfur can violate the octet rule because it has an empty D orbital . . .
    In sulfur or any atom with an expanded octet on the 3rd row, where does the idea that they have an empty D orbital come from ?





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