Solubility Products For Ions in Aqueous Solutions
ApBq(s) <==> pA+(aq) + qB-(aq)   Ksp = [A+(aq)]p[B-(aq)]q
U(unit)  =  mol(p+q)  / dm3(p+q)
Equilibrium Ksp(298 K)  p+q
Al(OH)3(s) <====> Al3+(aq) + 3 OH-1(aq) 1.0 X 10-32 4
AlPO4(s) <====>  Al3+(aq) + PO43-(aq)
9.83 X 10-21
2
As(OH)3(s) <====> As3+(aq) + 3 OH-1(aq) 2.1 X 10-1 4
BaCl2(s) <====> Ba2+(aq) + 2 Cl-1(aq) 1.1 X 10-10 3
BaC2O4(s) <====> Ba2+(aq) + C2O42-(aq) 1.7 X 10-7 2
BaCO3(s) <====> Ba2+(aq) + CO32-(aq) 2.58 X 10-9 2
BaCrO4(s) <====> Ba2+(aq) + CrO42-(aq) 1.17 X 10-10 2
BaF2(s) <====> Ba2+(aq) + 2 F-1(aq) 1.84 X 10-7 3
Ba(IO3)2(s) <====> Ba2+(aq) +  2 IO3-(aq)
4.01 X 10-9
3
Ba(IO3)2•H2O(s)  <====> Ba2+(aq) +  2 IO3-(aq) + H20
1.67 X 10-9
3
Ba(OH)2•8H2O(s) <==> Ba2+(aq)  + 2 OH-1(aq) + 8 H20
2.55 X 10-4
3
Ba3(PO4)2(s) <====>  3 Ba2+(aq) + 2 PO43-(aq) 5.8 X 10-38 5
BaHPO4(s) <====> Ba2+(aq) + HPO42-(aq) 4.0 X 10-8  2
BaSO3(s) <====> Ba2+(aq) + SO32-(aq) 8.0 X 10-7 2
BaSO4(s) <====>  Ba2+(aq) + SO42-(aq) 1.07 X 10-10 2
Be(OH)2(s) <====> Be2+(aq) + 2 OH-1(aq) 2.0 X 10-18 3
Bi2S3(s) <=====>  2 Bi3+(aq) + 3 S2-(aq)
1.82 X 10-99
5
BiAsO4(s) <====>  Bi3+(aq) + AsO42-(aq)
4.43 X 10-10
2
Bi(OH)3(s) <====>  Bi3+(aq) + 3 OH-1(aq) 4.0 X 10-31 4
CaCO3(s) <====> Ca2+(aq) + CO32-(aq) 4.96 X 10-9 2
CaC2O4(s) <====> Ca2+(aq) + C2O42-(aq) 2.3 X 10-9 2
CaCrO4(s) <====> Ca2+(aq) + CrO42-(aq)  7.1 X 10-4 2
CaC4H4O6(s) <====> Ca2+(aq) + C4H4O62-(aq) 7.7 X 10-7 2
CaF2(s) <====> Ca2+(aq) + 2 F-1(aq) 1.46 X 10-10 3
Ca(OH)2(s) <====> Ca2+(aq) + 2 OH-1(aq) 4.68 X 10-6  3
Ca(IO3)2(s) <====>  Ca2+(aq) +  2 IO3-1(aq)
6.47 X 10-6
3
Ca(IO3)2•6H2O(s) <====>  Ca2+(aq) +  2 IO3-1 + 6 H2O
7.54 X 10-7
3
Ca3(PO4)2(s) <====> 3 Ca2+(aq)+ 2 PO43-(aq) 2.07 X 10-33 5
CaC2O4•H2O(s) <====> Ca2+(aq) + C2O42-(aq) + H2O
2.34 X 10-9
2
CaSO3(s) <====> Ca2+(aq) + SO32-(aq) 3.0 X 10-7 2
CaSO4(s) <====> Ca2+(aq) + SO42-(aq) 7.10 X 10-5 2
Cd3(AsO4)2(s) <====>  3 Cd2+(aq) + 2 AsO43-(aq)
2.17 X 10-33
5
CdCO3(s) <====> Cd2+(aq) + CO32-(aq) 6.18 x 10-12 2
CdF2(s) <===>  Cd2+(aq)  +  2 F1-(aq)
6.44 X 10-3
3
Cd2[Fe(CN)6](s) <====> Cd2+(aq) + Fe(CN)62-(aq) 4.2 X 10-18 2
Cd(IO3)2(s)  <===>  Cd2+(aq) + 2 IO31-(aq)
2.49 X 10-8
3
Cd(OH)2(s) <====> Cd2+(aq) + 2 OH-1(aq) 5.27 X 10-15 3
CdC2O4•3H2O(s) <====>  Cd2+(aq)  +  C2O42-(aq) + 3 H2O
1.42 X 10-8
2
Cd3(PO4)2(s) <===>  3 Cd2+(aq)  +  3 PO43-(aq)
2.53 X 10-33
5
CdS(s) <====>  Cd2+(aq) + S2-(aq) 8.0 X 10-28 2
Ce(OH)2(s) <====> Ce2+(aq) + 2 OH-1(aq) 1.6 X 10-20 3
Cr(OH)2(s) <====> Cr2+(aq) + 2 OH-1(aq) 1.0 X 10-17  3
Cr(OH)3(s) <====> Cr2+(aq) + 3 OH-1(aq) 1.0 X 10-30 4
Co3(AsO4)2(s) <====>  3 Co2+(aq)  +  2 AsO43-(aq)
6.79 X 10-29    
5
CoCO3(s) <====> Co2+(aq) + CO32-(aq) 1.0 X 10-10 2
Co(OH)3(s)   <====>  Co2+(aq) + 3 OH-1(aq)  (pink)  1.09 X 10-15 4
Co(OH)3(s)   <====>  Co2+(aq) + 3 OH-1(aq)  (blue) 
5.92 X 10-15
4
Co(IO3)2•2H2O(s) <===>  Co2+(aq)  +  2 IO3-(aq)  + 2 H2O
1.21 X 10-2
3
Co3(PO4)2(s) <====>  3 Co2+(aq)  +  2 PO43-(aq)
2.05 X 10-35
5
CuBr(s) <====> Cu2+(aq) + Br-1(aq) 6.27 X 10-9 2
CuBr2(s) <====> Cu2+(aq) + 2 Br-(aq) 3.2 X 10-8 3
CuCl(s) <====> Cu+(aq) + Cl-(aq) 1.72 X 10-7  2
CuCO3(s) <====> Cu2+(aq) + CO32-(aq) 2.3 X 10-10  2
CuCrO4(s) <====> Cu2+(aq) + CrO42-(aq) 3.6 X 10-6 2
CuI(s) <====> Cu+(aq) + I-(aq) 1.27 X 10-12 2
Cu(IO3)2•H2O(s) <====> Cu2+(aq) + 2 IO3-(aq)  +  H2O
6.94 X 10-8 3
Cu(OH)2(s) <=====> Cu+2(aq)  + 2 OH-1(aq) 2.0 X 10-16  3
CuC2O4(s) <====> Cu2+(aq) + C2O42-(aq) 4.43 X 10-10 2
CuS(s) <====> Cu2+(aq) + S2-(aq) 2.26 X 10-48  2
CuSCN(s) <====> Cu1+(aq) + SCN1-(aq)
1.77 X 10-13
2
Cu3(AsO4)2(s) <====> 3 Cu2+(aq) + 2 AsO43-(aq)
7.93 X 10-36
5
Cu3(PO4)2(s) <====>  3 Cu2+(aq)  +  2 PO43-(aq)
1.39 X 10-37
5
FeCO3(s) <====> Fe2+(aq) + CO32-(aq) 3.07 X 10-11 2
FeF2(s) <====>  Fe2+(aq) + 2 F1-(aq)
2.36 X 10-6
3
FeC2O4(s) <====> Fe2+(aq) + C2O42-(aq) 2.1 X 10-7 2
Fe4[Fe(CN)6]3(s) <====> 4 Fe3+(aq) + 3 Fe(CN)64-(aq) 3.0 X 10-41 7
Fe(OH)2(s) <====>  Fe2+(aq) + 2 OH-(aq) 4.87 X 10-17 3
Fe(OH)3(aq) <====> Fe3+(aq) + 3 OH-(aq) 2.64X 10-39  4
FePO4•2H2O(s) <====>  Fe3+(aq) + PO43-(aq)  + 2 H2O 9.92 X 10-29 2
FeS(s) <====> Fe2+(aq) + S2-(aq) 6.00 X 10-19 2
AuCl3(s) <====> Au3+(aq) + 3 Cl-1(aq) 3.2 X 10-25 4
Au(OH)3(s) <====> Au3+(aq) + 3 OH-1(aq) 5.5 X 10-46 4
Pb3(AsO4)2(s)  <====> 3 Pb2+(aq) + 2 AsO43-(aq) 4.1 X 10-36 5
PbBr2(s) <====> Pb2+(aq) + 2 Br-1(aq) 6.60 X 10-6 3
PbCO3(s) <====> Pb2+(aq) + CO32-(aq) 1.46 X 10-13 2
PbCl2(s) <====> Pb2+(aq) + 2 Cl-1(aq) 1.17 X 10-5       3
PbC2O4(s) <====>  Pb2+(aq) + C2O42-(aq) 3.4 X 10-11 2
PbCrO4(s) <====> Pb2+(aq) + CrO42-(aq) 1.8 X 10-14  2
PbF2(s) <====> Pb2+(aq) + 2 F-1(aq) 7.12 X 10-7 3
Pb2[Fe(CN)6](s) <====> 2 Pb2+(aq) +  Fe(CN)64-(aq) 9.5 X 10-19 3
Pb(OH)2(s) <====> Pb2+(aq)  +  2 OH1-(aq)
1.42 X 10-20
3
PbI2(s) <====> Pb2+(aq) + 2 I-1(aq) 8.49 X 10-9  3
Pb(IO3)2(s) <====> Pb2+(aq) + 2 IO3-1(aq)
3.68 X 10-13
3
Pb(N3)2(s) <====> Pb2+(aq) + 2 N3-1(aq) 2.6 X 10-9 3
Pb3(PO4)2(s) <====>  3 Pb2+(aq) + 2 PO43-(aq) 3.0 X 10-44 5
PbSO4(s) <====> Pb2+(aq) + SO42-(aq) 1.82 X 10-8 2
PbS(s) <====>  Pb2+(aq) + S2-(aq) 3.00 X 10-28 2
Pb(SCN)2(s) <====>  Pb2+(aq)  + 2 SCN1-(aq)
2.11 X 10-5
3
Li2CO3(s) <====> 2 Li+1(aq) + CO32-(aq) 8.15 X 10-4 3
LiF(s) <====> Li+1(aq) + F-1(aq) 1.7 X 10-3 2
MgCO3(s) <====>  Mg2+(aq) + CO32-(aq) 6.82 X 10-6 2
MgCO3•3H2O(s) <====>  Mg2+(aq) + CO32- +  3 H2O
2.38 X 10-6
2
MgCO3•5H2O(s) <====>  Mg2+(aq) + CO32- +  5 H2O
3.79 X 10-6
2
MgF2(s) <====> Mg2+(aq) + 2 F-1(aq) 7.42 X 10-11 3
Mg(OH)2(s) <====> Mg2+(aq) + 2 OH-1(aq) 5.61 X 10-12 3
Mg3(PO4)2(s) <====> 3 Mg2+(aq) + 2 PO43-(aq) 9.86 X 10-25 5
MgNH4PO4(s) <====> Mg2+(aq) + NH4+(aq) + PO43-(aq) 2.5 X 10-13  3
HgBr2(s) <====> Hg2+(aq) + 2 Br-1(aq) 1.3 X 10-19 3
Hg2Br2(s) <====> Hg22+(aq) + 2 Br-1(aq)  6.41 X 10-23 3
Hg2CO3(s) <====> Hg22+(aq) + CO32-(aq) 3.67 X 10-17 2
Hg2Cl2(s) <====> Hg22+(aq) + 2 Cl-1(aq) 1.45 X 10-18  3
Hg2(CN)2(s) <====> Hg22+(aq) + 2 CN-1(aq) 5.0 X 10-40 3
Hg2C2O4(s) <====>  Hg22+(aq) + C2O42-(aq) 1.0 X 10-13  2
Hg2CrO4(s) <====> Hg2+(aq) + CrO42-(aq) 2.0 X 10-9 2
Hg2F2(s) <===> Hg22+(aq) + 2 F1-(aq)
3.10 X 10-6
3
Hg2I2(s) <====>  Hg22+(aq) + 2 I-1(aq) 5.33 X 10-29 3
HgI2(s) <====> Hg2+(aq) + 2 I-1(aq) 1.1 X 10-28 3
Hg(OH)2(s) <====> Hg2+(aq) + 2 OH-1(aq) 3.13 X 10-26 3
HgSe(s) <====> Hg2+(aq) + Se2-(aq) 1.0 X 10-59      2
HgS(black)(s) <====> Hg2+(aq) + S2-(aq)                                  2.0 X 10-53 2
HgS(red)(s) <====> Hg2+(aq) + S2-(aq) 4.0 X 10-54 2
Hg2SO4(s) <====>  Hg22+(aq) + SO42-(aq) 7.99 X 10-7 2
Hg2(SCN)2(s) <===>  Hg22+(aq) + 2 SCN1-(aq)
3.12 X 10-20
3
LaPO4(s) <====> La3+(aq) + PO43-(aq) 3.7 X 10-23 2
MnCO3(s) <====> Mn2+(aq) + CO32-(aq) 2.24 X 10-11 2
Mn(OH)2(s) <====> Mn2+(aq) + 2 OH-1(aq) 2.06 X 10-13 3
Mn(IO3)2(s)  <====>  Mn2+(aq) + 2 IO3-1(aq)
4.37 X 10-7
3
MnS(s) <===>  Mn2+(aq) + S2-(aq)
3.00 X 10-14
2
NiCO3(s) <====> Ni2+(aq) + CO32-(aq) 1.42 X 10-7 2
Ni(OH)2(s) <====> Ni2+(aq) + 2 OH-1(aq) 5.47 X 10-16 2
Ni(IO3)2(s) <====> Ni2+(aq) + 2 IO32-(aq)
4.71 X 10-5
3
Ni3(PO4)2(s) <====> 3 Ni2+(aq) + 2 PO42-(aq)
4.73 X 10-32
5
NiS(s) <====> Ni2+(aq) + S2-(aq) 1.07 X 10-21 2
PdS(s) <====> Pd2+(aq) + S2-(aq)
2.03 X 10-58
2
Pd(SCN)2(s) <====> Pd2+(aq) + 2 SCN1-(aq)
4.38 X 10-23
2
PtS(s) <====>  Pt2+(aq) + S2-(aq)
9.91 X 10-74
2
K2PtCl6(s) <====> 2 K+1(aq) + PtCl62-(aq) 7.48 X 10-6 3
KClO4(s) <====>  K+1(aq) + ClO4-1(aq) 1.05 X 10-2  2
RaSO4(s) <====>  Ra2+(aq) + SO42-(aq) 4.3 X 10-11 2
AgCH3COO(s) <===> Ag1+(aq) + CH3COO1-(aq)
1.94 X 10-3
2
Ag3AsO4(s) <===> 3 Ag1+(aq) + AsO43-(aq)
1.03 X 10-22
4
AgBr(s) <====> Ag+1(aq) + Br-1(aq) 5.34 X 10-13  2
AgBrO3(s) <====>  Ag+1(aq) + BrO3-1(aq) 5.34 X 10-5 2
AgCl(s) <====> Ag+1(aq) + Cl-1(aq) 1.77 X 10-10  2
Ag2CrO4(s) <====> 2 Ag+1(aq) + CrO42-(aq) 1.12 X 10-12 3
AgCNS(s) <====> Ag+1(aq) + CNS-1(aq) 2.0 X 10-12 2
Ag2CO3(s) <====> 2 Ag+(aq) + CO32-(aq) 8.45 X 10-12 3
Ag2Cr2O7(s) <====> 2 Ag+(aq) + Cr2O72-(aq) 1.02 X 10-11 3
AgCN(s) <====> Ag+(aq) + CN-(aq) 5.97 X 10-17 2
AgI(s) <====> Ag+(aq) + I-(aq) 8.51 X 10-17 2
AgIO3(s) <====> Ag+(aq) + IO3-(aq) 3.17 X 10-8 2
Ag2O(s) <====> 2 Ag+(aq) + O2-(aq) 1.9 X 10-8 3
Ag3PO4(s) <====> 3 Ag+(aq) + PO43-(aq) 8.88 X 10-17 4
Ag2SO3(s) <====> 2 Ag+(aq) + SO32-(aq) 1.49 X 10-14 3
Ag2SO4(s) <====> 2 Ag+(aq) + SO42-(aq) 1.20 X 10-5  3
Ag2S(s) <====> 2 Ag+1(aq) + S2-(aq) (alpha form)  6.00 X 10-51    3
Ag2S(s) <====> 2 Ag+1(aq) + S2-(aq) (beta form)
1.09 X 10-49
3
AgSCN(s) <====>  Ag1+(aq) + SCN1-(aq)
1.03 X 10-12
2
Sr3(AsO4)2(s) <====> 3 Sr2+(aq) + 2 AsO43-(aq)
4.29 X 10-19
5
SrC2O4(s) <====> Sr2+(aq) + C2O42-(aq)                                    5.0 X 10-8 2
SrCO3(s) <====> Sr2+(aq) + CO32-(aq) 5.60 X 10-10 2
SrF2(s) <====> Sr2+(aq) + 2 F-1(aq) 4.33 X 10-9 3
SrHPO4(s) <====> Sr2+(aq) + HPO42-(aq) 1.2 X 10-7 2
Sr(IO3)2(s) <====> Sr2+(aq) +  2 IO31-(aq)
1.14 X 10-7
3
SrSO4(s) <====> Sr2+(aq) + SO42-(aq) 3.44 X 10-7 2
Sn(OH)2(s) <====> Sn2+(aq) + 2 OH-1(aq) 5.45 X 10-27 3
SnS(s) <====> Sn2+(aq) + S-2(aq)
1.00 X 10-26
2
Th(OH)4(s) <====> Th4+(aq) + 4 OH-1(aq) 1.25 X 10-45  5
TlCl(s) <====>  Tl+1(aq) + Cl-1(aq) 1.75 X 10-4 2
TlI(s) <====> Tl+1(aq) + I-1(aq) 3.1 X 10-8 2
V(OH)3(s) <====> V3+(aq) + 3 OH-1(aq) 4.0 X 10-35 4
Zn3(AsO4)2(s) <====> 3 Zn2+(aq) + 2 AsO43-(aq)
3.12 X 10-28
5
ZnCO3(s) <====> Zn2+(aq) + CO32-(aq) 1.19 X 10-10 2
ZnF2(s) <====>  Zn2+(aq) + 2 F-1(aq)
3.04 X 10-2
2
Zn(CN)2(s) <====>  Zn2+(aq) + 2 CN-1(aq) 3.0 X 10-16  3
ZnC2O4(s) <====> Zn2+(aq) + C2O42-(aq) 7.5 X 10-9 2
Zn2[Fe(CN)6](s) <====> 2 Zn2+(aq) + Fe(CN)64-(aq) 2.1 X 10-16  3
Zn(OH)2(s) <====>  Zn2+(aq) + 2 OH-1(aq)  (gamma form) 6.86 X 10-17 3
Zn(OH)2(s) <====>  Zn2+(aq) + 2 OH-1(aq)  (beta form)
7.71 X 10-17
3
Zn(OH)2(s) <====>  Zn2+(aq) + 2 OH-1(aq)  (epsilon form)
4.12 X 10-17
3
Zn(IO3)2(s) <====>    Zn2+(aq) + 2 IO3-1(aq)
4.29 X 10-6
3
Zn3(PO4)2(s) <====> 3 Zn2+(aq) + 2 PO43-(aq) 5.0 X 10-36 5
ZnS(s) <====> Zn2+(aq) + S2-(aq) 1.6 X 10-24  2
ZnS(s) <====> Zn2+(aq) + S2-(aq) 2.00 X 10-25 2