# Could someone give me a list of precipitates for the following ions : Hg^+,Hg_2^{2+},Cr^{2+},Cr^{3+},Mn^{2+,3+,4+,5+,6+,7+},Co^{2+,3+},Ni^{2+,3+}(the list must include the precipitate's colour too) ?

Sep 13, 2017

Are you joking? Have you not got an inorganic text?

#### Explanation:

There are general rules for assessing solubilities in aqueous solution:

All the salts of the $\text{alkali metals}$ and $\text{ammonium}$ are soluble;

All $\text{nitrates}$, and $\text{perchlorates}$ are soluble.

All $\text{halides}$ are soluble EXCEPT for  AgX, Hg_2X_2, PbX_2".

All $\text{sulfates}$ are soluble EXCEPT for $P b S {O}_{4} , B a S {O}_{4} , H g S {O}_{4}$.

All $\text{oxides, carbonates, and hydroxides are insoluble}$. All $\text{sulfides}$ are insoluble.

The given rules follow a hierarchy. Alkali metal and ammonium salts tend to be soluble in all circumstances. The one exception to this rule is K^(+)""^(-)BPh_4 and NH_4^(+)""^(-)BPh_4, both of which are as soluble as bricks. Na^+""^(-)BPh_4, the which has some aqueous solubility, is sold as \text{kalignost}, i.e. $\text{potassium recognizer}$.............

Your question is far too open-ended.....