kepolaran molekul
TRANSCRIPT
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Molecular Shape & Molecular Polarity
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In molecules with more than two atoms, both shape and bond polarity determine molecular polarity.
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The dipole moment (µ) is the product of these partial charges and the distance
between them.
It is typically measured in debye (D) units; using the SI units of charge (coulomb, C) and length (meter, m),
1 D = 3,34X 10-30 Cm
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The Pauling electronegativity (EN) scale.
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Arrange each set of bonds in order of increasing polarity, and indicate bond polarity with δ + and δ - symbols:
(a)Cl-F, Br-CI, CI-CI
(b) Si-Cl, P-CI, S - CI, Si-Si
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Polar Covalent Bonds
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CO2
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H2O
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CCl4
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CHCl3
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Prediksi apakah molekul di bawah ini adalah molekul polar atau non polar:
•Ammonia, NH3 •Boron trifluoride, BF3•Carbonyl sulfide, COS (atom sequence
SCO)
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Answer
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BF3
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COS
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TASK
Show the bond dipoles and molecular dipole, if any, for :
•dichloromethane (CH2CI2)• iodine oxide pentafluoride (IOF5)•nitrogen tribromide (NBr3)
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CH2CI2
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IOF5
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NBr3
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The answer
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