Solubility Rules

Question 1

Soluble with exceptions

Answer 1

1- Group 1A (alkali metals) compounds are soluble
2- Amonium compounds are soluble
3- Acetate compounds are soluble
4- Nitrate compounds are soluble
5- MOST chlorides compounds are soluble

EXCEPT :
AgCl, Hg2Cl2, PbCl2,
AgBr, Hg2Br2, HgBr2,
AgI, Hg2I2, HgI2, PbI2

6- MOST sulfates compounds are soluble

EXCEPT:
CaSO4, SrSO4, BaSO4
Ag2SO4, Hg2SO4, PbSO4

Question 2

Insoluble with exceptions

Answer 2

1- MOST carbonate compounds are insoluble

EXCEPT:
Group 1A cabonates

2- MOST phosphate compounds are insoluble

EXCEPT:
Group 1A phosphates and (NH4)3PO4

3- MOST sulfides compounds are insoluble

EXCEPT:
Group 1A sulfides and (NH4)2S

4- MOST hydroxide compounds are insoluble

EXCEPT:
Group 1A hydroxides, Ca(OH)2, Sr(OH)2, Ba(OH)2

Question 3

Simple solubility rules

Answer 3

Most nitrate salts are soluble

Most alkali metals (Group1A) salts and amonium are soluble

Most chloride, bromide, iodine salts are soluble (except silver, lead and hercury (I))

Most sulfates salt are soluble (except BaSO4, PbSO4, Hg2SO4, CaSO4)

Most hydroxide are only slightly soluble (NaOH, KOH are soluble, Ba(OH)2, Ca(OH)2 are slightly soluble)

Most sulfide, carbonate, chromate and phosphate salts are only slightly soluble, (except those with amonium, then soluble)