What is the best set of Solubility Rules?

[BrazilianRider]

I swear, every set of solubility rules is different, and depending on the software you're using, you're gonna get screwed on a question...

For example, Ca(OH)2 is slightly soluble in Bootcamp, but not soluble in Destroyer. How the hell are we supposed to know this stuff?

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[panmit]

Follow the solubility rules that Chad gives you. Most hydroxides are insoluble in water, except for Group I hydroxides.

There are so many solubility rules that it is impossible to memorize. Technically, Ca(OH)2 is slightly soluble, but its beyond the scope of the DAT

 

[FeralisExtremum]

Here's what I have in my notes:

Solubility Rules

1) All Group I metal, NH4+,NO3-ClO4-,and C2H3O2-(acetate) salts are soluble.

2) Most Ag+,Pb2+,and Hg22+salts are insoluble.

3) All chlorides, bromides, and iodides are water soluble EXCEPT Ag+,Pb2+,and Hg22+

4) All salts w/ SO42- are water soluble EXCEPT Ca2+, Sr2+, Ba2+, Pb2+

5) All metal oxides are insoluble except alkali metals + CaO, SrO, BaO (which hydrolyze to form solutions of corresponding metal hydroxides).

6) All hydroxides are insoluble w/ exception to alkali metals + Ca2+, Sr2+, Ba2+.

7) All carbonates (CO32-), phosphates (PO43-), sulfides (S2-), and sulfites (SO32-) are insoluble, except alkali metals + NH4+


Note that rule 1 overrides rule 2, so if you have something like a Group I metal with Pb, it would be soluble.