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

1 Answer
Feb 2, 2017

Answer:

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.