Solubility rules

Question 1

Salts containing Group I elements

Answer 1

(Li+, Na+, K+, Cs+, Rb+) are soluble . There are few exceptions to this rule. Salts containing the ammonium ion (NH4+) are also soluble

Question 2

Salts containing nitrate ion (NO3-)

Answer 2

Generally soluble

Question 3

Salts containing Cl -, Br -, or I -

Answer 3

Generally soluble. Important exceptions to this rule are halide salts of Ag+, Pb2+, and (Hg2)2+. Thus, AgCl, PbBr2, and Hg2Cl2 are insoluble.

Question 4

Most silver salts

Answer 4

Insoluble. AgNO3 and Ag(C2H3O2) are common soluble salts of silver; virtually all others are insoluble.

Question 5

Most sulfate salts

Answer 5

soluble. Important exceptions to this rule include CaSO4, BaSO4, PbSO4, Ag2SO4 and SrSO4 .

Question 6

Most hydroxide salts

Answer 6

only slightly soluble. Hydroxide salts of Group I elements are soluble. Hydroxide salts of Group II elements (Ca, Sr, and Ba) are slightly soluble. Hydroxide salts of transition metals and Al3+ are insoluble. Thus, Fe(OH)3, Al(OH)3, Co(OH)2 are not soluble

Question 7

Most sulfides of transition metals

Answer 7

highly insoluble, including CdS, FeS, ZnS, and Ag2S. Arsenic, antimony, bismuth, and lead sulfides are also insoluble

Question 8

Carbonates

Answer 8

frequently insoluble. Group II carbonates (CaCO3, SrCO3, and BaCO​3) are insoluble, as are FeCO3 and PbCO3.

Question 9

Chromates

Answer 9

frequently insoluble. Examples include PbCrO4 and BaCrO4.

Question 10

Phosphates such as Ca3(PO4)2 and Ag3PO4

Answer 10

Frequently insoluble.

Question 11

Fluorides such as BaF2, MgF2, and PbF2

Answer 11

frequently insoluble