2C - Polarity - VDW or Permanent Dip - Dip IMF

     1)    Draw the shapes of the following molecules showing any polar covalent bonds. 

            Show any dipoles on the diagrams:  [6]

                a)    H₂    b)    Cl₂    c)    HCl    d)    H₂O    e)    NH₃    f)    CCl₄

    2)    For the molecules in (1), state whether the molecule is 'polar' or 'non - polar'.  [6]

    3)    Draw dot and cross diagrams for the following pairs of molecules:  [4]

                a)    BF₃    and    PF₃

                b)    CO₂    and    SO₂

                c)    For each of the above pairs, predict and sketch the shapes and show any dipoles.  [2]

                d)    Explain the polarities of each pair.  [4]

     4)    Using your answers above, determine which intermolecular forces exist between the following molecules.

            Van der Waals or Permanent dipole - dipole interactions:  [10]

                a)    H₂    b)    Cl₂    c)    HCl    d)    H₂O    e)    NH₃   

                f)    CCl₄       g)    BF₃    h)    PF₃     i)    CO₂   j)    SO₂

    5)    What is the pattern between Qu2,3 and Q4.  [2]