Homework 7 Page 1 Physical Basis of Chemistry Seventh Set of Problems Due to the necessity of drawing Lewis structures to answer some of these question Please include the last zip44, this will facilitate prompt delivery. Submit your homework so that I receive it no later than Monday, April 17. 1. For each of the following molecules/ions unless otherwise indicated the central atom is the first atom in the chemical formula. Thus, all other atoms in the molecule are attached only to the central atom and not to each other in any way.] Consider the following: chlorate ion: C103 sulfur trioxide: SO3 perchlorate ion: C104: dichloroacetylene (C2Cl2), arrangement: CI-C-C-CI); and the oxalate anion (C204), arrangement: 1-2 CO 0 0 Draw the best Lewis octet structure each of the above molecules/ions-based upon formal charge considerations. For your best structure, please display all non-zero formal charges. If more than one (resonance) structure contributes equally to the best structure, please show all equivalent resonance structures. Homework 7 Page 3 4. Draw (best) Lewis structures and use the VSEPR model to answer/explain the following. [For each of the listed molecules below the central atom is the first atom in the chemical formula. Thus, all other atoms in the molecule are attached only to the central atom and not to each other in any way. (a) Silicon tetrachloride (SiCl4) and silicon dioxide (SiO2) are predicted to be non-polar whereas phosphorus trichloride (PC13) and silicon dichloride (SiC12) are predicted to be polar. Sĩ Cly về 4+74 82 ei Fee non polar SiO2 ve 4tlela)-16 :0= FCs 44to)-0 polar MUST Explani Why? Recall.. IT IS NOT FLAT BONDS TO explain IDENTIcel ATUMS FCO 6-(2+4)-0-IDENTICAL PClove 6+7(8) 20 2017 piles due to it's and different regions (untraided regions. LMOST, E -1 SiCl2 ve 4+ (2) 18 and bent S Fesi 4(302)--1 polar (b) Intermolecular Forces (IMF's) are attractive forces that arise between molecules due 10 charges polarizing within the molecule. Thus, molecules that are predicted to be polar (using the VSEPR model) should have stronger IMF's than non-polar molecules. [Of course, for the polar molecules, the greater the polarity of the individual polar covalent bonds, the stronger the resultant IMF's. A consequence of all of this is that properties that are affected by intermolecular forces such as the liquid gas boiling temperature (a.k.a. boiling point)- can be rationalized by the relative strengths of these IMF's. With all of the above in mind please answer the following. Be sure to explain your answers.

Lewis Structures Homework 7

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