1.  Write a balanced chemical equation to represent the addition polymerization of 1,1-dichloroethylene.  The product of this reaction is Saran, used in plastic wrap.
        The balanced chemical equation for the addition polymerization:
                                    (   Cl      H     )                         (  Cl       H   )
                                    (    I        I      )                         (   I         I    )
                                 n (   C===C     )    --------->    --(--C===C---)--
                                    (    I        I      )                         (   I         I    )
                                    (   Cl      H    )                          (  Cl      H    ) n

5.  The monomer glycine (NH₂--CH₂--COOOH) can undergo condensation polymerization to form polyglycine, in which the structural units are joined by amide linkages.
    (a)  What molecule is split off in the formation of polyglycine?
        The molecule split off is water, H₂O.
    (b)  Draw a structure of the repeat unit in polyglycine.
                            (  H    H           )
                            (   I      I            )
                         --(--N---C----C--)--
                            (          I      II   )
                            (         H     O   )  n

13.  How many tripeptides can be synthesized using just three different species of a-ammino acids?
        To determine this we multiply three different ammino acids by the another three ammino acids.  We then multipy that by another three possible ammino acids.  That is how we determine how many combinations of tripeptides can produced, allowing the repetition of a-ammino acids.
                        =    3  x  3  x  3
                        =    27 possible tripeptides

 Previous Chapter
 Home
 Chapter Index