water

Question 1

what is it mean to be polar? explain using water as an example.

Answer 1

• unequal sharing of e- between atoms.
• in water’s case, the oxygen atom has a slight - charge, it pulls the slightly + hydrogens towards it
• the polar covalent bond is between the hydrogen and oxygen molecule(s)

Question 2

what is polar covalent?

Answer 2

• polar mixes with polar/anything that has a charge
• H2O dissolves/mixes with anything polar or charged
• something that is polar is soluble in H2O

Question 3

what is non polar covalent?

Answer 3

• equal sharing of e-
• non-polar mixes with non-polar
• cannot mix or dissolve in water
• insoluble in water
• ex. H2, Cl2

Question 4

hydrophilic

Answer 4

• likes H2O
• must be polar

Question 5

hydrophobic

Answer 5

• “fears” H2O
• must be non-polar
• ex. lipids