Solubility Rules

Question 1

Are common compounds of Group 1A ions (Li^+, Na^+, K^+, etc.) soluble or insoluble?

Answer 1

Soluble with no exceptions

Question 2

Are common compounds of ammonium (NH4^+) soluble or insoluble?

Answer 2

Soluble with no exceptions

Question 3

Are common nitrates (NO3^-), acetates (CH3COO^- or C2H3O2^-), and perchlorates (ClO4^-) soluble or insoluble?

Answer 3

Soluble with no exceptions

Question 4

Are common chlorides, bromides, and iodides soluble or insoluble?

Answer 4

Soluble, except for compounds with Ag, Pb, Cu, and Hg

Question 5

Are common fluorides soluble or insoluble?

Answer 5

Soluble, except for PbF2 and fluorides of Group 2A, such as MgF2.

Question 6

Are common sulfates soluble or insoluble?

Answer 6

Soluble, except for CaSO4, SrSO4, BaSO4, Ag2SO4, and PbSO4

Question 7

Are common metal hydroxides soluble or insoluble?

Answer 7

Insoluble, except for Group 1A hydroxides and Ca(OH)2, Sr(OH)2, and Ba(OH)2

Question 8

Are common carbonates, chromates, and phosphates soluble or insoluble?

Answer 8

Insoluble, except for compounds with Group 1A elements and ammonium (NH4^+)