Solubility Rules Chart Page 2
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1
2+
+
+
alkali ions (Li
, Na
, K
,
+
+
+
Rb
, Cs
, Fr
),
strontium hydroxide,
2+
2+
2+
+
+
Sr
, Ba
, Ra
, Tl
,
=
soluble
Sr(OH)
, is soluble
2
+
and H
(aq), and NH
4
hydroxide
silver hydroxide,
-
OH
low solubility
AgOH, is insoluble
+
any other cation
=
(insoluble)
(forms a precipitate)
+
+
+
alkali ions (Li
, Na
, K
,
ammonium
+
+
+
Rb
, Cs
, Fr
),
phosphate, (NH
)
PO
,
Phosphate
4
3
4
+
=
soluble
+
3-
(PO
),
and H
(aq), and NH
is soluble
4
4
Carbonate
magnesium
2-
low solubility
(CO
),
3
carbonate, MgCO
, is
3
2-
+
any other cation
=
(insoluble)
Sulfite (SO
)
3
insoluble
+
+
+
alkali ions (Li
, Na
, K
,
sodium chromate,
+
+
+
Rb
, Cs
, Fr
),
+
=
soluble
Na
CrO
, is soluble
2+
2+
+
2
4
Chromate
Ca
, Sr
, and NH
,
4
2-
CrO
low solubility
4
+
any other cation
=
(insoluble)
General Solubility Trends:
All compounds of the ammonium ion (NH
+
), and of the Alkali metal (Group IA) cations,
4
are soluble.
All nitrates and actetates are soluble.
All chlorides, bromides, and iodides are soluble EXCEPT those of silver, lead, and
mercury(I).
All sulfates are soluble EXCEPT those of silver, lead, mercury(I), barium, strontium, and
calcium.
All carbonates, sulfites, and phosphates are insoluble EXCEPT those of ammonium and
Alkali metal (Group IA) cations.
All hydroxides are insoluble EXCEPT those of ammonium, barium, and alkali metal
(Group IA) cations.
All sulfides are insoluble EXCEPT those of ammonium, Alkali metal (Group I) cations, and
Alkali earth metal (Group II) cations.
All oxides are insoluble EXCEPT those of calcium, barium, and Alkali metal (Group I)
cations; these soluble ones actually react with the water to form hydroxides.
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