Only some salts are insoluble.
Insoluble salts are the products of precipitation reactions.
Insoluble salts are not the products of electrolysis.
Insoluble salts are the products of precipitation reactions.
Salts are prepared by a reaction between an acid and a base; the insoluble salt is a precipitate.
Salts may be soluble or insoluble in water.
Insoluble salts doesn't diffuse in water.
insoluble salts
As all other salts they contain generally a cation and an anion.
This is not mandatory: some salts are very soluble, some salts are very insoluble.
Probable you think to inorganic and organic salts; also, soluble or insoluble salts, colored or colorless salts, etc.
The preparation of insoluble salt can be done by PRECIPITATION METHOD
A compound can be insoluble or not; but not the cation. You think probable, for example, to silver halogenides.