polarity and characteristics of water molecules?

Question

I have acouple questions.
What type of special bond to water molecues make with other molecules because of polarity? Could you also explain to me the differences between polar and non-polar. What are the three characteristics of water molecules that are result of the bonds? And the three major types of biomolecules?
Thanks

Answer 1

Carbon can make covelant bounds that are stable.
saturated fat have a maximum number of hydrogen atoms
unsaturated fat dont (becauz of double bonds between carbon atoms)
Poly unsaturated fat have many double bounds between carbon atoms
Water's polarity help it to make hydrogen bonds with a lot of solute.


I'm sure that it's in your text book. Look for it again if my answers don't help

Answer 2

Polar molecules are molecules with one section that is more negative and an other that is more positive. This happens because, one atom in the molecule is so much larger than the other. Therefore the electron spends more time orbiting that atom giving it a more negative charge than the other atoms in the molecule, thus making the other atoms slightly more positive.
Polar molecules are ones in which the charge is distributed evenly. For example O2 (a oxygen molecule) since it is two of the same atoms the electron they share spends an equal about of time in the outter shells of both atoms.
Water is a polar molecule. Therefore, the hydrogen atoms have a slight positive charge and the one oxygen atom have a slight negative charge. As a result the hydrogen atoms will be attracted to the oxygen atoms of other water molecules the same way a positive ion is attracted to a negative ion, this is called hydrogen bonding.
This gives water high surface tension, individual water molecules are attracted to each other, that is why certain bugs and animal can walk on the surface of water. Second, unlike other molecules water is more dense in a liquid state than a solid state(ice).
Surface tension is related to the cohesive properties of water. Capillary action however, is related to the adhesive properties of water. You can see capillary action 'in action' by placing a straw into a glass of water. The water 'climbs' up the straw. What is happening is that the water molecules are attracted to the straw molecules. When one water molecule moves closer to a the straw molecules the other water molecules (which are cohesively attracted to that water molecule) also move up into the straw. Capillary action is limited by gravity and the size of the straw.
There are more than three that are very related, sorry can't think of anymore.
Biomolecules: the four major biomolecules are carbohydrates (sugars, glucose for example), proteins (hemoglobin, the protein in red blood cells) proteins are made of amino acids, lipids (fats, steriods, and oils, fatty acids for example), and nucleic acids (DNA and RNA)
About the water there is alot of stuff on line that will explain the concepts of visuals!

Answer 3

Water: High heat capacity Polar Forms H-bonds Forms crystalline structure when heated High mp/bp for molecular weight Polarity: In short, uneven electron density caused by bonds between an atom of high and low electronegativity. It allows hydrogen bonds on certain cases (When H is bonded to an electronegative atom such as N, O, F)

Answer 4

Water molecules can form hydrogen bonds with other molecules, which are just a special case of very strong dipole-dipole interactions.

Three characteristics of water which result from hydrogen bond formation are: very high boiling point, very high heat of vaporization, very high specific heat.

Three major types of biomolecules (I think there are actually 4) are proteins, carbohydrates, nucleic acids and lipids.