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Courtesy of Alzet Osmotic Pumps Pharmaceutics Cancer Treatments Painkillers Agriculture Fertilization of crops Fragrances Air freshener Bug repellant
#1: Semi-permeable membranes and controlled concentrations can create a zero-order rate of diffusion. #2: Polar membranes diffuse polar substances like alcohols at a zero- order rate.
J = mass flux D = diffusion co- efficient dC = C IN - C OUT dX = thickness of membrane
(Ra) 2 = 4(δ D1 -δ D2 ) 2 + (δ P1 -δ P2 ) 2 + (δ H1 - δ H2 ) 2 RED = Ra/Ro δ D = London dispersion forces δ P = Dipole-dipole interactions δ H = Hydrogen bonding Ra = Solubility difference Ro = Solubility radius RED = Relative energy difference
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Citric AcidAscorbic Acid Acetylsalicylic Acid 147.76 g/100 mL33.O g/100 mL0.30 g/100 mL
Chemistry of Water Chapters What Makes Water So Special? Polarity- waters bent shape creates δ- and δ+ areas in the molecule.
Cell Membrane & Cellular Transport
Unit 4: Solutions & Solubility
Water has a lower molar mass and a higher boiling point Dispersion forces do not account for this.
Intermolecular Forces Notes. Intermolecular Forces o Intermolecular Forces: attraction between molecules o Much weaker than chemical bonds.
Intermolecular Forces of Attraction. CA Standards Students know the atoms and molecules in liquids move in a random pattern relative to one another because.
Mass Balance in the Body (through intestine, lungs, skin) (by kidneys, liver, lungs, skin) BODY LOAD Metabolic production Metabolism to a new substance.
Do Now: How is the cell membrane shown below like a colander?
Osmosis. When the diffusing substance is water, and when the diffusion takes place through a semi permeable membrane the process is called osmosis. Also.
OSMOSIS OSMOSIS: The diffusion of water through a selectively permeable membrane SELECTIVELY PERMEABLE: some substances pass like water and others do.
What elements make up proteins?
8.8: Limits of Solubility When we dissolve a solid in some liquid, what is actually happening? –Take glucose added to water H-bonding between water molecules.
1 Chapter 4 Compounds and Their Bonds 4.8 Attractive Forces in Compounds Copyright © 2009 by Pearson Education, Inc. °
Liquids and Solutions Ch. 14 and 15.
Cells, membranes and environments. 4.4 Movement across membranes “Cells must be able to exchange substances with their environment (Figure 4.10a).”
Solutions Chapter 6 What Are Solutions? Solution: homogeneous mixture of 2 or more substances Solution: homogeneous mixture of 2 or more substances –Solid,
Basic Chemistry Copyright © 2011 Pearson Education, Inc. Chapter 10 Structures of Solids and Liquids 10.4 Attractive Forces between Particles 1.
A sample of neon gas at atm compresses from L to L
Intermolecular Forces The physical properties of melting point, boiling point, vapor pressure, evaporation, viscosity, surface tension, and solubility.
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