|
Title: HYDROPHOBIC FORCES Post by: timorito on Nov 28, 2011 Where do hydrophobic forces exist?
a. water only b. in polar solvents please explain Title: Re: HYDROPHOBIC FORCES Post by: duddy on Nov 28, 2011 b. in polar solvents Both actually. Water is technically a polar solvent that has a dipole, with the oxygen being most electronegative and attracting the electrons. This causes the hydrogen atoms to temporarily have a lesser charge, and this in turn causes the weak hydrogen atoms to become attracted to the oxygen of other water molecules nearby. (http://upload.wikimedia.org/wikipedia/commons/thumb/c/c6/3D_model_hydrogen_bonds_in_water.svg/250px-3D_model_hydrogen_bonds_in_water.svg.png) Title: Re: HYDROPHOBIC FORCES Post by: haiderfamily on Nov 30, 2011 Any substance of molecules that have hydrophobic effect meaning is that molecules/substances have fear of water. For example of mixing water with oil. Yes polarity is important but unusual and/or important properties of water include: high polarity, hydrogen bonding, cohesion, adhesion, high specific heat, and high heat of vaporization. water is, by far and away, the most common molecule that exists as a liquid at typical ambient Earth temperatures. Water is a powerful dissolver of polar ions and molecules (polar solvent), and a similarly powerful excluder of nonpolar molecules. These properties of water are all important and/or crucial to the existence of life as we know it.
Title: Re: HYDROPHOBIC FORCES Post by: bio_man on Nov 30, 2011 timorito, please mark this as solved.
|