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why do only some salts dissolve ?are there any rules which tell you which will?

Sagot :

Insoluble salts are ionic compounds that are insoluble in water: the salt continues to exist as a solid rather than dissolving in the liquid. ... When a salt such as sodium chloride (table salt) dissolves in water, its ionic lattice is pulled apart so that the individual sodium and chloride ions go into solution.

Answer:

The solubility of certain salts can be explained due to the small size of the particles.  

Explanation:

As we know, solvents dissolve due to intermolecular spaces between two substance particles, Hence the solvent particle size should fit in those spaces.