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The Geometry of HCL ?

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Mrhyde

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On Dat Destryoer Gen Chem number 42. It asked which molecules where linear ?

But one of the choices was HCl .... I chose that HCl was not linear but rather tetrahedral.

Well HCl is tetrahedral for electron domain geometry , but linear for molecular domain geometry.

How am I supposed to know which domain they want me to answer from , because technically i was right but I was wrong since they wanted the molecular domain answer And they never specified if they wanted me to decide the geometry based on Electron or Molecular ?
 

Shadi65

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HCl is linear for both cases!
"A diatomic molecule, a molecule composed of only 2 atoms, must always be linear in shape as the centres of the 2 atoms will always be in a straight line."
HCl has two atoms, and if you draw it you can see the only possible structure is linear structure.
 

Lnguyen7

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On Dat Destryoer Gen Chem number 42. It asked which molecules where linear ?

But one of the choices was HCl .... I chose that HCl was not linear but rather tetrahedral.

Well HCl is tetrahedral for electron domain geometry , but linear for molecular domain geometry.

How am I supposed to know which domain they want me to answer from , because technically i was right but I was wrong since they wanted the molecular domain answer And they never specified if they wanted me to decide the geometry based on Electron or Molecular ?

You want to look at the general shape of the whole molecule.
 

orgoman22

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    On Dat Destryoer Gen Chem number 42. It asked which molecules where linear ?

    But one of the choices was HCl .... I chose that HCl was not linear but rather tetrahedral.

    Well HCl is tetrahedral for electron domain geometry , but linear for molecular domain geometry.

    How am I supposed to know which domain they want me to answer from , because technically i was right but I was wrong since they wanted the molecular domain answer And they never specified if they wanted me to decide the geometry based on Electron or Molecular ?

    For all questions,,,,,,,Shape pertains to MOLECULAR GEOMETRY....... For example.....the shape of H2O, H2S, and H2Se...would be BENT !!!!

    Hope this helps.

    Dr. Romano
     
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    deleted738762

    Wait, so usually you look at the center atom to know the shape. So are all molecules with 2 atoms linear. Since H-Cl, Cl has 3 lone pairs and a bond. That's 4 electron domains. Hydrogen has one electron domain. You can't really tell so I assume it's always linear for elements with 2 atoms like carbon monoxide?
     
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