Transcript Document
Compound
Solubility
Melting
Time
Conductivity in
solution
Conductivity as
solid
Main focus on conductivity
We observe 2 types of behavior among compounds:
One type of compound does NOT conduct electricity either as a solid or as a
liquid
Composed of neutral accumulations of atoms we call molecules
Behavior is typical of compounds of nonmetals, but there are exceptions
The other type of compound does not conduct as a solid, but it does when
dissolved
Dissolving into oppositely charged particles we call “ions” that can move freely
in a solution
The presence of an electric field causes these charged particles (ions) to
migrate which results in an electrical current
Behavior typical of metal and nonmetal together
So what’s happening at the molecular
level when these compounds dissolve?
Conductivity of solid CuCl2 and in
solution
Discussion
• Why do the metal ions change from being soluble in solution
to insoluble at the surface of the cathode?
• Why do the nonmetal ions change from being soluble in
solution to insoluble at the surface of the anode?