Solubility rules

Sorry, a lot of the compounds are written

backward; I didn’t realize I was doing it wrong

until half way through.

Josh Hedgepeth

S(NH4)2

NH4- is ALWAYS Soluble

SBa

S2- is ONLY soluble with

ALL Alkali Metals and

Ca2+, Sr2+, and Ba2+

Mg(OH)2

OH- is soluble ONLY

with Alkali Metals and

Ca2+, Sr2+, and Ba2+

NO3Na

NO3- is ALWAYS Soluble

SK2

S2- is ONLY soluble with

ALL Alkali Metals and

Ca2+, Sr2+, and Ba2+

AgCl

Cl is always Soluble

EXCEPT when paired with

Ag+, Hg22+, and Pb2+

NO3Cs

NO3- is ALWAYS Soluble

Hg2I2

I- is always Soluble

EXCEPT when paired with

Ag+, Hg22+, and Pb2+

Zn(CH3CO2)2

CH3OO- is ALWAYS

Soluble

OH2Cs

OH- is soluble ONLY

with Alkali Metals and

Ca2+, Sr2+, and Ba2+

SO4Sr

SO42- is always Soluble

EXCEPT when paired with

Sr2+, Hg22+,Ba2+, and Pb2+

CaCO3

CO32- is ONLY soluble with

ALL Alkali Metals

OHFr

OH- is soluble ONLY

with Alkali Metals and

Ca2+, Sr2+, and Ba2+

OHNH4

NH4- is ALWAYS Soluble

SSr

S2- is ONLY soluble with

ALL Alkali Metals and

Ca2+, Sr2+, and Ba2+

NiS

S2- is ONLY soluble with

ALL Alkali Metals and

Ca2+, Sr2+, and Ba2+

OHCs

OH- is soluble ONLY

with Alkali Metals and

Ca2+, Sr2+, and Ba2+

SNa2

S2- is ONLY soluble with

ALL Alkali Metals and

Ca2+, Sr2+, and Ba2+

PO4Li3

PO43- is ONLY soluble with

ALL Alkali Metals

Cu(OH)2

OH- is soluble ONLY

with Alkali Metals and

Ca2+, Sr2+, and Ba2+

Cu3(PO4)2

PO43- is ONLY soluble with

ALL Alkali Metals

NH4R R=any element or compound

NH4- is ALWAYS Soluble

CO3(NH4)2

NH4- is ALWAYS Soluble

Pb(CH3CO2)2

CH3OO- is ALWAYS

Soluble

BaSO4

SO42- is always Soluble

EXCEPT when paired with

Sr2+, Hg22+,Ba2+, and Pb2+

PO4Rb3

PO43- is ONLY soluble with

ALL Alkali Metals

OH2Sr

OH- is soluble ONLY

with Alkali Metals and

Ca2+, Sr2+, and Ba2+

CO3Fr2

CO32- is ONLY soluble with

ALL Alkali Metals

PbBr2

Br- is always Soluble

EXCEPT when paired with

Ag+, Hg22+, and Pb2+

NO3Ru

NO3- is ALWAYS Soluble

SCs

S2- is ONLY soluble with

ALL Alkali Metals and

Ca2+, Sr2+, and Ba2+

SO4Hg

SO42- is always Soluble

EXCEPT when paired with

Sr2+, Hg22+,Ba2+, and Pb2+

PO4(NH4)3

NH4- is ALWAYS Soluble

CH3OOR R=any element or compound

CH3OO- is ALWAYS

Soluble

PO4Na3

NH4- is ALWAYS Soluble

PbCl2

Cl is always Soluble

EXCEPT when paired with

Ag+, Hg22+, and Pb2+

OHK

OH- is soluble ONLY

with Alkali Metals and

Ca2+, Sr2+, and Ba2+

SO4Pb

SO42- is always Soluble

EXCEPT when paired with

Sr2+, Hg22+,Ba2+, and Pb2+

NO3Li

NO3- is ALWAYS Soluble

NO3R R=any element or compound

NO3- is ALWAYS Soluble

AgI

I- is always Soluble

EXCEPT when paired with

Ag+, Hg22+, and Pb2+

SO4Ba

SO42- is always Soluble

EXCEPT when paired with

Sr2+, Hg22+,Ba2+, and Pb2+

OH2Ba

OH- is soluble ONLY

with Alkali Metals and

Ca2+, Sr2+, and Ba2+