How to know if a salt is poorly soluble in water or it dissociates completely?

1 Answer
Feb 2, 2017

How else but by experiment?

Explanation:

In your inorganic/analytical text you will find a list of K_"sp" values where "sp" stands for "solubility product". These values MUST be experimentally determined. There are standard rules of aqueous solubility: all nitrates are soluble; all halides are soluble except for those of Pb^(2+), Ag^+, and Hg_2^(2+).........etc.

See here for an old answer, and here is another. The questions show how solubility data, K_"sp" values, are used for calculation.