For each pair of molecules decide which molecule is most polar and explain your answer. a....
For each pair of molecules decide which molecule is most polar and explain your answer.
a. CCI4 or CHCI3
b. CH3CI or CH3I
Homework Answers
a. CCl4 is a symmetrical molecule hence has a zero dipole moment so no polarity .
CHCl3 on the other hand has a C---H polar bond and rest of the three C----Cl bond polarity cancels out each other hence has a very small dipole moment.
Hence CHCl3 has more polarity than CCl4
b. The dipole moment is based on the product of charge and the distance between the two different molecules. In case of CH3Cl and CH3I difference between electronegativity of c and cl are more but the size of Cl is small as compared to I .Hence the interatomic distance between C---I is more than that of C---Cl so the dipole moment is more and hence more polarity.
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