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Basicity is 1?

  1. Jul 13, 2011 #1
    Basicity is 1??

    I was studying about Volumetric Analysis. In the chapter, there is a table which shows basicity of some acids. One is H3PO2. Its basicity is given as 1. But basicity of an acid is number of replacable hydrogen atoms present in one molecule of acid. So, bascitiy of H3PO2 should be 3. But that's not true according to book. It is 1. :confused:
     
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  3. Jul 13, 2011 #2

    epenguin

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    Re: Basicity is 1??

    You'd be right if you were talking about H3PO3. :smile:
     
  4. Jul 13, 2011 #3
    Re: Basicity is 1??

    But why is its basicity 1?:confused:
     
  5. Jul 13, 2011 #4

    epenguin

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    Re: Basicity is 1??

    It looks like you are just confusing phosphoric acid where 3 H's are attached via O with hyopophorous acid where two H's are attached to P.

    http://en.wikipedia.org/wiki/Hypophosphorous_acid

    You are a lot less likely to ever meet the second, you are full enough of the first and esters and anhydrides of it in a very dynamic state.
     
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