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Biology
Chapter 3
24
Biology
Undergraduate 1
02/02/2014

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Term
Polar Molecule
Definition
Unequal sharing of electron, charge unevenly distributed
Term
Cohesion
Definition
Water sticks to another molecule
Term
Adhesion
Definition
Water sticks to other substances
Term
Surface Tension
Definition
Measure of how difficult it is to stretch or break the surface of a liquid, hydrogen forming hydrogen bonds with water but not air
Term
Temperature
Definition
Measure of heat intensity
Term
Specific Heat of Water
Definition
Amount of heat the must be absorbed or lost for 1 gram to change its temp by 1 degree Celsius
Term
Heat of evaporation
Definition
How much energy is used to vaporize
Term
Alcohol vs Water During Evaporation
Definition
Alcohol cant make as many hydrogen bonds so it evaporates quicker
Term
Solution
Definition
Mixture of two or more substances
Term
Solvent
Definition
Dissolving agent of a solution (water)
Term
Solute
Definition
Substance that is dissolved (NaCl)
Term
Aqueous Solution
Definition
Solution where water is the solvent
Term
Hydration Spheres
Definition
Solvent surround and pull apart solute
Term
Hydrophilic
Definition
Polar, dissolves in water
Term
Hydrophobic
Definition
Non polar, doesn't dissolve in water, stays separate
Term
Colloid
Definition
Large hydrophobic molecules that do not dissolve
Term
Molecular Mass
Definition
Sum of the masses of all the atoms in a molecule
Term
Mole
Definition
Represents an exact number of objects
Term
Hydrogen Ion
Definition
H+, single proton with a charge of +1
Term
Hydroxide Ion
Definition
OH-, has a charge of -1, lose of protein
Term
Acid
Definition
Substance that increases the hydrogen ion concentration of a solution
Term
Base
Definition
Substance that reduces the hydrogen ion concentration of a solutions
Term
Buffer
Definition
Substance that minimizes change in the concentrations of H+ and OH-
Term
pH
Definition
Negative log of the hydrogen ion concentration
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