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Homework Help: IB past paper, chemichal bonding

  1. Mar 11, 2010 #1

    IB1

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    a-) In 1954 Linus Pauling was awarded the Chemistry Nobel Prize for his work on the nature of the chemical bond. Covalent bonds are one example of intramolecular bonding.
    Explain the formation of the following:
    i) [tex] \sigma [/tex] (sigma) bonding
    ii) [tex] \pi [/tex] (pi) bonding
    iii) double bonds
    iv) triple bonds

    b-) Atomic orbitals can mix by hybridization to form new orbitals for bonding. Identify the type of hybridization present in each of the three following molecules
    Deduce and explain their shapes:
    i) [tex] OF_2 [/tex]
    ii) [tex] H_2 CO [/tex]
    iii) C_2 H_2

    c-) Three scientists shared the Chemistry Nobel Prize in 1996 for the discovery of the fullerenes. Fullerenes, like diamond and graphite, are allotropes of the element carbon.
    i) State the structures of and the bonding in diamond and graphite
    ii) Compare and explain the hardness and electrical conductivity of diamond and graphite
    iii) Predict and explain how the hardness and electrical conductivity of C60 fullerene would compare with that of diamond and graphite.





    I have already solved a-) i and ii but not iii and iv
    I have solved b-) i and ii but not iii
    and I couldn't solve c-) at all.

    I ask members for full solutions so I can learn how to write complete proper chemistry solutions. Of course, that doesn't mean that I ask you to solve each i, ii and iii for each question.

    Your help will be appreciated.
     
  2. jcsd
  3. Mar 12, 2010 #2

    Borek

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    Staff: Mentor

    You won't get this type of help here.
     
  4. Apr 3, 2010 #3

    IB1

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    Why not? Aren't we here to learn and share ideas ? What kind of help I can find here?
     
  5. Apr 3, 2010 #4

    Borek

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    Staff: Mentor

  6. Apr 3, 2010 #5

    IB1

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    Thank you. It seems that I was wrong, and what I asked was clearly against the rules of this forum. I do agree that every problem should not be given full solution, but instead of that a link to a similar problem with full solution may be provided as help. However, that shouldn't mean that for full solutions should never be provided (yes, I read the rules).

    hmm... Maybe I should stop this rebel voice and agree with rules, and study instead.

    Thank you anyways. I'll not expect from someone to give me full solutions, and I'm not going to give full solutions to anyone in the future, at least not here.
     
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