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3R physics question

Discussion in 'MCAT: Medical College Admissions Test' started by qinnu, Apr 11, 2004.

  1. qinnu

    qinnu Member
    7+ Year Member

    Oct 12, 2003
    Likes Received:
    Question 19

    It is asking you to guess the observed dipole moment of HF. I agree that CL is less electronegative. However Cl has an extra electron layer and hence bigger than F. Dipole is charge X speparation distance. I don't understand how you could say for sure that HCl should have a smaller dipole than HF.

  2. Nuel

    10+ Year Member

    Mar 8, 2003
    Likes Received:
    Compared to chlorine, fluorine is more electronegative, hence a greater dipole moment when it's bonded to H.
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