ION Concentration

Ionic compounds are made up of two parts
-Cation: positively charged particle
-Anion: negatively charged particle

when ionic compounds are dissolved in water the cation and anion separate from each other, this is known as dissociation.
when writing dissociation equations the charges and atoms must balance.
 Example: The dissociation of potassium sulfide is:  K2S —> K+ + S2-
 K2S —> 2K+ + S2-

If two solutions are added together, then the volume changes. The ions are diluted.

The equation is C1V1 = C2V2