Polarity
Exercises
Decide if the following substances are polar and say why !Click for the answers.
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$S_8$ $CS_2$ $PH_3$ $CHCl_2$ $CHCl_3$ $CH_2O$ $CH_4O$ $C_2Cl_6$ $CH_2O_2$ $SO_2$
Answers
Non-polar:
No difference in the electronegativities, therefore no dipole.
Non-polar:
Linear symetrical molecule and no difference in the electronegativities.
Non-polar:
Tetrahedral molecule (summit of tetrahedron occupied by an electron pair on P), but no difference in electronegativities.
Polar:
Tetrahedral molecule, the dipoles don't cancel themselves out.
Polar:
Tetrahedral molecule, the dipoles don't cancel themselves out.
Polar:
Planar molecule, the dipoles don't cancel themselves out.
Polar:
Tetrahedral molecule, the dipoles don't cancel themselves out.
Non-polar:
Symetrical molecule, the dipoles cancel themselves out.
Polar:
Planar molecule , the dipoles don't cancel themselves out.
Polar:
Folded structure derived from a tetrahedron, where two summits are occupied by electron pairs
