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    hslove142331's Avatar
    hslove142331 Posts: 71, Reputation: 1
    Junior Member
     
    #1

    Jan 25, 2010, 10:04 PM
    Select all of the intermolecular attractive forces present in each compound.
    1.Acetic acid, CH3COOH (Recall that the acid functional group contains an -OH and a double bonded oxygen.)

    2.Hydrogen sulfide, H2S

    3.Sulfur trioxide, SO3

    4.Methylamine, CH3NH2


    *ionic bonds

    Dipole-dipole interactions

    Hydrogen bonds

    Ion-dipole forces

    Ion-induced dipole forces

    London forces*

    I think each question has more than one answer..
    But I am still confusing that which one is correct for each questions
    Can you explain each molecular attractive forces?
    Thanks
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Jan 26, 2010, 08:33 AM

    You really don't know any of the different types of bonding?

    Ionic: Occurs between two ions of opposite charge.

    Dipole-dipole: Occurs non-polar in molecules and is directly proportional to the number of electrons in the molecules.

    Hydrogen bonds: Occurs in highly electronegative elements bonded to hydrogen atoms (Electronegative elements concerned N, O, F)

    Ion-dipole: Occurs polar in molecules

    Ion-induced dipole forces: this is the same as dipole dipole as far as I know

    London forces: This is a common term for all of dipole dipole and ion dipole and hydrogen bonds.
    hslove142331's Avatar
    hslove142331 Posts: 71, Reputation: 1
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    #3

    Jan 26, 2010, 09:02 PM
    1.Acetic acid, CH3COOH (Recall that the acid functional group contains an -OH and a double bonded oxygen.)


    2.Hydrogen sulfide, H2S
    Ionic bond
    London forces

    3.Sulfur trioxide, SO3
    Ion dipole force
    London forces

    4.Methylamine, CH3NH2


    I don't know... I am confusing to figure out.. please more help
    Thanks.. Please check that answers..
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #4

    Jan 27, 2010, 10:23 AM

    CH3COOH: (molecule)
    Dipole-dipole
    London forces
    Hydrogen bonds (H atom directly attached to electronegative O atom)
    Ion dipole (because of H bonds)

    H2S: (bent molecule)
    Dipole-dipole
    London forces
    Ion dipole (because of polar nature of molecule; bent)

    SO3: (triangular planar molecule)
    Dipole-dipole
    London forces

    CH3NH2: (molecule)
    Dipole-dipole
    London forces
    Hydrogen bonds (H atom directly attached to electronegative N atom)
    Ion dipole (because of H bonds)

    Note: I didn't say ion-induced dipole since I consider it the same as dipole dipole.
    hslove142331's Avatar
    hslove142331 Posts: 71, Reputation: 1
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    #5

    Jan 27, 2010, 02:35 PM
    I put like this in my WileyPlus it say all incorrect..
    So confusing please help me..
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #6

    Jan 28, 2010, 07:11 AM

    I don't know about it, but If I were to choose only one (as opposed to your question: "all intermolecular attractive forces"),the main force of attraction, because the rest are often referred to as 'too inaccurate', this is how I'd do it.

    None of them contain ionic bonding, because none of them are ions, but molecules, covalent molecules.

    CH3COOH: Hydrogen bonds

    H2S: ion dipole (I call it permanent dipole dipole here)

    SO3: dipole-dipole (I call it induced dipole dipole)

    CH3NH2: Hydrogen bonds

    The only intermolecular forces of attraction I learned are:
    Hydrogen bonds
    Permanent dipole-dipole
    Induced dipole-dipole

    All three of them being Van der Waals forces (or London forces)

    Hydrogen bonding is a special type of permanent dipole dipole.

    Unless I misunderstood one of the terms you used, I don't see how the answers I gave are wrong...
    HockeyBuddha's Avatar
    HockeyBuddha Posts: 1, Reputation: 1
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    #7

    Aug 29, 2011, 03:56 PM
    CH3COOH:
    Hydrogen bonds
    London forces
    Dipole-dipole interactions

    H2S:
    Dipole-dipole interactions
    London forces

    SO3:
    London forces

    CH3NH2:
    Hydrogen bonds
    Dipole-dipole interactions
    London forces

    These were the correct answers for me in WileyPLUS.

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