Chapter 2.5-2.6: Life's Chemical Basis

Substance, typically a liquid, that can dissolve other substances; e.g., water

A dissolved substance

Describes a substance that dissolves easily in water; e.g., a salt Having a strong affinity for water

Describes a substance that resists dissolving in water; e.g., an oil Lacking affinity for water

Measure of molecular motion

Transition of a liquid to a gas; requires energy input

Tendency of molecules to stick together under tension; a property of liquid water

an atom of hydrogen that has lost its electron. they are the key to the reactions of acids

released from bases when added to water

A measure of the number of hydrogen ions in a solution

Any substance that releases hydrogen ions in water

A substance that accepts hydrogen ions as it dissolves in water

Compound that dissolves easily in water and releases ions other than H+ and OH-

Set of chemicals that can keep the pH of a solution stable by alternately donating and accepting ions that contribute to pH