Just as a bond can be polar or nonpolar, we can also classify an entire molecule...
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Just as a bond can be polar or nonpolar, we can also classify an entire molecule as polar or nonpolar. A molecule is said to be polar if the overall (net) effect of all the dipole moments in each bond do not cancel each other out. To determine polarity of a molecule, we first determine the molecular geometry and then draw an arrow pointing from the positive to negative side of each bond. The overall effect of each dipole is then considered. After you draw the molecular geometry, consider what would happen to the central atom if you tied a rope to each of the outside atoms and pulled. Or, if you're morbid (like the textbook I stole these pictures from) consider what would happen to the man below: trase He stays put... meaning the SO molecule is nonpolar. He moves. meaning the SOCI molecule is polar. Do all of the <suffering> man's limbs in the picture above rip off at the same time? If they do, then the molecule has no dipole moment (is non-polar). If one or more of his limbs rips off first, then the molecule has a nonzero dipole moment (is polar). Examples: Classify each molecule below as polar or non-polar. Justify your answers using 3-D VSEPR models and dipole moment vectors. CC14 Cl₂ H₂O 03 SiO₂ IF5 CH3CI SnCl3 NO3™ BF3 PF5 SF4 Just as a bond can be polar or nonpolar, we can also classify an entire molecule as polar or nonpolar. A molecule is said to be polar if the overall (net) effect of all the dipole moments in each bond do not cancel each other out. To determine polarity of a molecule, we first determine the molecular geometry and then draw an arrow pointing from the positive to negative side of each bond. The overall effect of each dipole is then considered. After you draw the molecular geometry, consider what would happen to the central atom if you tied a rope to each of the outside atoms and pulled. Or, if you're morbid (like the textbook I stole these pictures from) consider what would happen to the man below: trase He stays put... meaning the SO molecule is nonpolar. He moves. meaning the SOCI molecule is polar. Do all of the <suffering> man's limbs in the picture above rip off at the same time? If they do, then the molecule has no dipole moment (is non-polar). If one or more of his limbs rips off first, then the molecule has a nonzero dipole moment (is polar). Examples: Classify each molecule below as polar or non-polar. Justify your answers using 3-D VSEPR models and dipole moment vectors. CC14 Cl₂ H₂O 03 SiO₂ IF5 CH3CI SnCl3 NO3™ BF3 PF5 SF4
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Related Book For
Foundations of Financial Management
ISBN: 978-1259024979
10th Canadian edition
Authors: Stanley Block, Geoffrey Hirt, Bartley Danielsen, Doug Short, Michael Perretta
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