kepolaran molekul
Post on 29-Nov-2014
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Molecular Shape & Molecular Polarity
In molecules with more than two atoms, both shape and bond polarity determine molecular polarity.
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
The Pauling electronegativity (EN) scale.
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
Polar Covalent Bonds
CO2
H2O
CCl4
CHCl3
Prediksi apakah molekul di bawah ini adalah molekul polar atau non polar:
•Ammonia, NH3 •Boron trifluoride, BF3•Carbonyl sulfide, COS (atom sequence
SCO)
Answer
BF3
COS
TASK
Show the bond dipoles and molecular dipole, if any, for :
•dichloromethane (CH2CI2)• iodine oxide pentafluoride (IOF5)•nitrogen tribromide (NBr3)
CH2CI2
IOF5
NBr3
The answer
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