CLASS 14

CLASS 14 - phospholipids assemble to form a bilayer...

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Nonpolar Solvents 1- Hexane (C 6 H 12 ) molecules do not form hydrogen bonds so explain why benzene is liquid at room temperature. 2- What factors determine whether a molecule will be more soluble in a polar or a non-polar solvent? 1) Fat soluble – molecules soluble in hydrocarbon (NP) induced dipole 2) Proportion of polar (water-soluble) and NP (fat-soluble) regions polar solutes dissolve in polar solvents and visa versa 1- Certain molecules (like fatty acids) have polar heads and non-polar tails. Sketch a diagram to shown how these molecules arrange themselves in water. Why does this happen? 2- How do dishwashing detergents manage to clean grease? *3- Use principles of solubility to explain why
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Unformatted text preview: phospholipids assemble to form a bilayer structure in a cell membrane. 1) NP (hydrophobic) & polar (hydrophilic) - makes structure to form a sphere with hydrophobic part hides from H2O (interior) and hydrophilic region interacts w/H2O (exterior); H2O self-assembly micelle 2) The hydrophobic hydrocarbons are repelled by water, but are attracted to oil and grease. The hydrophilic end of the same molecule is attracted to water, while the other side is binding to oil. 3) Every membrane is like a sandwich Transport processes 1-What is diffusion ? What class demonstration was used to illustrate diffusion? 1) Net movement of an area of higher concentration to an area with lower concentration; air freshener...
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