16San Bernardino Burbank Santa Barbara 73° 100° 90° Riverside 96° Fig. 3-5San Bernardino100°Burbank90°Santa Barbara 73°Riverside 96°Los Angeles(Airport) 75°Santa Ana84°Palm Springs106°70s (°F)80sPacific Ocean90s100sFigure 3.5 The effect of a large body of water on climateSan Diego 72°40 miles
25Fig. 3-8Figure 3.8 A water-soluble protein(a) Lysozyme molecule in anonaqueous environment(b) Lysozyme molecule (purple) in an aqueousenvironment(c) Ionic and polar regionson the protein’s surfaceattract water molecules.
28What is a mole?The amount of a substance equal to the molecular mass in grams of that substanceMolecular mass is the sum of all masses of all atoms in a moleculeEx. Molecular mass of sucrose C12H22O11 isC = 12 x 12 = 144H = 22 x = 22O = 11 x 16 = 176So……………….342 g
31Mr. Mole (Avogadro)Remember, oneMole of any substancehas the SAME numberof molecules.6.02 x 1023
32Concept 3.3: Acidic and basic conditions affect living organisms A hydrogen atom in a hydrogen bond between two water molecules can shift from one to the other:The hydrogen atom leaves its electron behind and is transferred as a proton, or hydrogen ion (H+)The molecule with the extra proton is now a hydronium ion (H3O+), though it is often represented as H+The molecule that lost the proton is now a hydroxide ion (OH–)
33Fig. 3-UN2HHOHOOHOHHHH2H2OHydroniumion (H3O+)Hydroxideion (OH–)Water is in a state of dynamic equilibrium in which water molecules dissociate at the same rate at which they are being reformed