The Lewis structures of four compounds are given. Which of these molecules are polar? CH2Cl2 SO2...

The Lewis structures of four compounds are given. Which of these molecules are polar? CH2Cl2 SO2 PCl3 CO2

Solutions

Expert Solution

CO2 - nonpolar because the dipole moments on the molecule cancels

SO2 - polar because the dipole moments on the O do not cancel (SO2 assumes a tetrahedral shape)

PCl3 - polar because the P-Cl bonds do not cancel out

CH2Cl2 - polar because the C-Cl bonds do not cancel. (CH bond are nonpolar)

The other answer assumed that all of the molecules are nonpolar; that is not correct. He may have assumed that SO2 obeyed the octet rule and did not take into account the polarity of bonds in PCl3 and CH2Cl2.

queen_honey_blossom answered 1 year ago

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