Ap Bio Chapter 3

Front 1

acid

Back 1

a substance that increases the hydrogen ion concentration of a solution

Front 2

adhesion

Back 2

the attraction between different kinds of molecules

Front 3

base

Back 3

a substance that reduces the hydrogen ion concentration of a solution

Front 4

buffer

Back 4

a substance that consists of acid and base forms in a solution and that minimizes change in pH when extraneous acids or bases are added to the solution

Front 5

cohesion

Back 5

the binding together of like molecules, often by hydrogen bonds

Front 6

evaporation

Back 6

the process by which a liquid changes to a gas

Front 7

hydration shell

Back 7

the sphere of water molecules around a dissolved ion

Front 8

hydrogen bond

Back 8

a type of weak chemical bond that is formed when the slightly positive hydrogen atom of a polar covalent bond in one molecule is attracted to the slightly negative atom of a polar covalent bond in another molecule

Front 9

hydrophilic

Back 9

having an affinity for water

Front 10

hydrophobic

Back 10

having an aversion to water; tending to coalesce and form droplets in water

Front 11

molarity

Back 11

a common measure of solute concentration, referring to the number of moles of solute per liter of solution

Front 12

pH

Back 12

a measure of hydrogen ion concentration equal to -log [H+] and ranging in value from 0 to 14.

Front 13

polar molecule

Back 13

a molecule (such as water) with the opposite charge on different ends of the molecule

Front 14

solute

Back 14

a substance that is dissolved in a solution

Front 15

solution

Back 15

a liquid that is a homogenous mixture of two or more substances

Front 16

solvent

Back 16

the dissolving agent of a solution. Water is the most versatile ____ known.

Front 17

surface tension

Back 17

a measure of how difficult it is to stretch or break the surface of a liquid. Water has a high _____ because of the hydrogen bonding of surface molecules.