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Equilibrium constant for the ionization of a weak electrolyte.

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Semipermable Membrane

A thin partition between two solutions through which certain molecules can pass but others cannot.

Ideal Gas

A hypothetical gas that obeys exactly all postulates of the kinetic-molecular theory.

 

Dumas Method

A method used to determine the molecular weights of volatile liquids.

Alkali Metals

Metals of Group IA (Na, K, Rb).

Physical Change

A change in which a substance changes from one physical state to another but no substances with different composition are formed. Example Gas to Liquid - Solid.

 

Photochemical Smog

A brownish smog occurring in urban areas receiving large amounts of sunlight, caused by photochemical (light-induced) reactions among nitrogen oxides, hydrocarbons and other components of polluted air that produce photochemical oxidants.

 

Specific Heat

The amount of heat required to raise the temperature of one gram of substance one degree Celsius.

Miscibility

The ability of one liquid to mix with (dissolve in) another liquid.

Diamonds Are Forever

Diamonds are still a girl's best friend, right? We love the shiny gems. They are the most popular rocks sold today. But what exactly are they, anyway? Where do they come from? What else are they used for?

Electrolytic Conduction

Conduction of electrical current by ions through a solution or pure liquid.