Appendix 10

Appendix 10, Solubility of Ions

Anions are Negative, Cations are Positive

These Anions Called Do NOT ppt with
these Cations DO ppt with
these Cations

NO₃^- nitrate Most cations None

CH₃COO^- acetate Most cations Ag⁺

Cl^- chloride Most cations Ag⁺, Pb⁺², Hg₂⁺², Cu⁺

Br^- bromide Most cations Ag⁺, Pb⁺², Hg₂⁺², Cu⁺

I^- iodide Most cations Ag⁺, Pb⁺², Hg₂⁺², Cu⁺

SO₄^-2 sulfate Most cations Ba⁺², Sr⁺², Pb⁺², Ag⁺, Ca⁺²

CrO₄^-2 chromate Most cations Ba⁺², Sr⁺², Pb⁺², Ag⁺

S^-2 sulfide NH₄⁺, & columns I & II
of periodic chart Most others

OH^- hydroxide NH₄⁺, Ba⁺², Sr^+2,&
column I of per. chart Most others

CO₃^-2 carbonate NH₄⁺, and column I
per. chart except Li⁺¹ Most others

PO₄^-3 phosphate NH₄⁺, and column I
per. chart except Li⁺¹ Most others

. . . .

These Cations . Form Soluble Compds
with most anions No Precipitates

Na⁺, K⁺ . Most anions .

H⁺ . Most anions .

These Anions	Called	Do NOT ppt with these Cations	DO ppt with these Cations
NO₃^-	nitrate	Most cations	None
CH₃COO^-	acetate	Most cations	Ag⁺
Cl^-	chloride	Most cations	Ag⁺, Pb⁺², Hg₂⁺², Cu⁺
Br^-	bromide	Most cations	Ag⁺, Pb⁺², Hg₂⁺², Cu⁺
I^-	iodide	Most cations	Ag⁺, Pb⁺², Hg₂⁺², Cu⁺
SO₄^-2	sulfate	Most cations	Ba⁺², Sr⁺², Pb⁺², Ag⁺, Ca⁺²
CrO₄^-2	chromate	Most cations	Ba⁺², Sr⁺², Pb⁺², Ag⁺
S^-2	sulfide	NH₄⁺, & columns I & II of periodic chart	Most others
OH^-	hydroxide	NH₄⁺, Ba⁺², Sr^+2,& column I of per. chart	Most others
CO₃^-2	carbonate	NH₄⁺, and column I per. chart except Li⁺¹	Most others
PO₄^-3	phosphate	NH₄⁺, and column I per. chart except Li⁺¹	Most others
.	.	.	.
These Cations	.	Form Soluble Compds with most anions	No Precipitates
Na⁺, K⁺	.	Most anions	.
H⁺	.	Most anions	.