3C.2 Non-Polar And Polar Molecules

Question 1

what is a dipole

Answer 1

exist when two charges of equal magnitude but opposite signs are separated by a small distance which is caused by the bond pairs going closer to the more Electronegative element

Question 2

each molecule has its own

Answer 2

dipole

Question 3

the overall dipole of a molecule depends on

Answer 3

the shape of the molecule, depending on the relative bond angles, the dipoles van either reinforce themselves or cancel out each other

Question 4

what happens to dipoles that cancel each other

Answer 4

the molecule would have no overall dipole and would be said to be non-polor

Question 5

what happens to dipoles that reinforce themselves

Answer 5

the molecule would possess an overall diploe and will be said to be polar

Question 6

what are examples of diatomic nonpolar molecules

Answer 6

H2 and Cl2 as each of them have the same Electronegativity making them cancel out

Question 7

what are examples of diatomic polar molecules

Answer 7

it is polar because the Cl Electronegativity of (3) is stronger than the Electronegativity of H (2.1)

Question 8

what is the symbol used to represent dipole

Answer 8

—-|——>

Question 9

what is an example of a nonpolar linear molecule

Answer 9

CO2 as both the bonds in carbon is polar but they cancel each other out

Question 10

what is an example of a nonpolar trigonal planar molecule

Answer 10

BCl3, all the bonds are polar but they are symmetrical so they cancel each other out

Question 11

what is an example of a nonpolar Tetrahedral molecule

Answer 11

tetrachloromethane (CCl4) all the bonds are polar but since its symmetrical, they cancel out each other

Question 12

what is an example of a polar Tetrahedral molecule

Answer 12

trichloromethane (CHCl3) even though all the bonds are symmetrical the dipoles reinforce each other (because of the hydrogen

Question 13

what is an example of a polar Original pyramidal molecule

Answer 13

ammonia (NH3) they all reinforce each other

Question 14

what is an example of a polar v-shaped molecule molecule

Answer 14

water (H2O) they all reinforce each other

Question 15

the polarity of a molecule is measured by

Answer 15

a dipole moment

Question 16

how do we find the dipole moment in diatomic and polyatomic molecules

Answer 16

by finding the difference of charging then multiplying by the distance of separation between the charges
(for polyatomic its more complicated because we have to take into consideration the polarity of each bond and the lone pairs in the outer shells