631
Solubility Product Constants at 25°C
Substance Formula K
sp
Aluminum hydroxide Al(OH)
3
1.3 × 10
–33
Aluminum phosphate AlPO
4
6.3 × 10
–19
Barium carbonate BaCO
3
5.1 × 10
–9
Barium chromate BaCrO
4
1.2 × 10
–10
Barium uoride BaF
2
1.0 × 10
–6
Barium hydroxide Ba(OH)
2
5 × 10
–3
Barium sulfate BaSO
4
1.1 × 10
–10
Barium sulte BaSO
3
8 × 10
–7
Barium thiosulfate BaS
2
O
3
1.6 × 10
–6
Bismuthyl chloride BiOCl 1.8 × 10
–31
Bismuthyl hydroxide BiOOH 4 × 10
–10
Cadmium carbonate CdCO
3
5.2 × 10
–12
Cadmium hydroxide Cd(OH)
2
2.5 × 10
–14
Cadmium oxalate CdC
2
O
4
1.5 × 10
–8
Cadmium sulde
a
CdS 8 × 10
–28
Calcium carbonate CaCO
3
2.8 × 10
–9
Calcium chromate CaCrO
4
7.1 × 10
–4
Calcium uoride CaF
2
5.3 × 10
–9
Calcium hydrogen phosphate CaHPO
4
1 × 10
–7
Calcium hydroxide Ca(OH)
2
5.5 × 10
–6
Calcium oxalate CaC
2
O
4
2.7 × 10
–9
Calcium phosphate Ca
3
(PO
4
)
2
2.0 × 10
–29
Calcium sulfate CaSO
4
9.1 × 10
–6
Calcium sulte CaSO
3
6.8 × 10
–8
Chromium(II) hydroxide Cr(OH)
2
2 × 10
–16
Chromium(III) hydroxide Cr(OH)
3
6.3 × 10
–31
Cobalt(II) carbonate CoCO
3
1.4 × 10
–13
Cobalt(II) hydroxide Co(OH)
2
1.6 × 10
–15
Cobalt(III) hydroxide Co(OH)
3
1.6 × 10
–44
Cobalt(II) sulde
a
CoS 4 × 10
–21
Copper(I) chloride CuCl 1.2 × 10
–6
Copper(I) cyanide CuCN 3.2 × 10
–20
Copper(I) iodide CuI 1.1 × 10
–12
Copper(II) arsenate Cu
3
(AsO
4
)
2
7.6 × 10
–36
Copper(II) carbonate CuCO
3
1.4 × 10
–10
Copper(II) chromate CuCrO
4
3.6 × 10
–6
Copper(II) ferrocyanide Cu[Fe(CN)
6
] 1.3 × 10
–16
Copper(II) hydroxide Cu(OH)
2
2.2 × 10
–20
Copper(II) sulde
a
CuS 6 × 10
–37
Iron(II) carbonate FeCO
3
3.2 × 10
–11
Iron(II) hydroxide Fe(OH)
2
8.0 × 10
–16
Iron(II) sulde
a
FeS 6 × 10
–19
Iron(III) arsenate FeAsO
4
5.7 × 10
–21
Iron(III) ferrocyanide Fe
4
[Fe(CN)
6
]
3
3.3 × 10
–41
Continued
632 Solubility Product Constants at 25°C
Substance Formula K
sp
Iron(III) hydroxide Fe(OH)
3
4 × 10
–38
Iron(III) phosphate FePO
4
1.3 × 10
–22
Lead(II) arsenate Pb
3
(AsO
4
)
2
4 × 10
–36
Lead(II) azide Pb(N
3
)
2
2.5 × 10
–9
Lead(II) bromide PbBr
2
4.0 × 10
–5
Lead(II) carbonate PbCO
3
7.4 × 10
–14
Lead(II) chloride PbCl
2
1.6 × 10
–5
Lead(II) chromate PbCrO
4
2.8 × 10
–13
Lead(II) uoride PbF
2
2.7 × 10
–8
Lead(II) hydroxide Pb(OH)
2
1.2 × 10
–15
Lead(II) iodide PbI
2
7.1 × 10
–9
Lead(II) sulfate PbSO
4
1.6 × 10
–8
Lead(II) sulde
a
PbS 3 × 10
–28
Lithium carbonate Li
2
CO
3
2.5 × 10
–2
Lithium uoride LiF 3.8 × 10
–3
Lithium phosphate Li
3
PO
4
3.2 × 10
–9
Magnesium ammonium phosphate MgNH
4
PO
4
2.5 × 10
–13
Magnesium arsenate Mg
3
(AsO
4
)
2
2 × 10
–20
Magnesium carbonate MgCO
3
3.5 × 10
–8
Magnesium uoride MgF
2
3.7 × 10
–8
Magnesium hydroxide Mg(OH)
2
1.8 × 10
–11
Magnesium oxalate MgC
2
O
4
8.5 × 10
–5
Magnesium phosphate Mg
3
(PO
4
)
2
1 × 10
–25
Manganese(II) carbonate MnCO
3
1.8 × 10
–11
Manganese(II) hydroxide Mn(OH)
2
1.9 × 10
–13
Manganese(II) sulde
a
MnS 3 × 10
–14
Mercury(I) bromide Hg
2
Br
2
5.6 × 10
–23
Mercury(I) chloride Hg
2
Cl
2
1.3 × 10
–18
Mercury(I) iodide Hg
2
I
2
4.5 × 10
–29
Mercury(II) sulde
a
HgS 2 × 10
–53
Nickel(II) carbonate NiCO
3
6.6 × 10
–9
Nickel(II) hydroxide Ni(OH)
2
2.0 × 10
–15
Nickel(II) sulde
a
NiS 3 × 10
–19
Scandium uoride ScF
3
4.2 × 10
–18
Scandium hydroxide Sc(OH)
3
8.0 × 10
–31
Silver acetate AgC
2
H
3
O
2
2.0 × 10
–3
Silver arsenate Ag
3
AsO
4
1.0 × 10
–22
Silver azide AgN
3
2.8 × 10
–9
Silver bromide AgBr 5.0 × 10
–13
Silver chloride AgCl 1.8 × 10
–10
Silver chromate Ag
2
CrO
4
1.1 × 10
–12
Silver cyanide AgCN 1.2 × 10
–16
Silver iodate AgIO
3
3.0 × 10
–8
Silver iodide AgI 8.5 × 10
–17
Silver nitrite AgNO
2
6.0 × 10
–4
Silver sulfate Ag
2
SO
4
1.4 × 10
–5
Silver sulde
a
Ag
2
S 6 × 10
–51
Silver sulte Ag
2
SO
3
1.5 × 10
–14
Silver thiocyanate AgSCN 1.0 × 10
–12
Strontium carbonate SrCO
3
1.1 × 10
–10
Continued
633Solubility Product Constants at 2C
Substance Formula K
sp
Strontium chromate SrCrO
4
2.2 × 10
–5
Strontium uoride SrF
2
2.5 × 10
–9
Strontium sulfate SrSO
4
3.2 × 10
–7
Thallium(I) bromide TlBr 3.4 × 10
–6
Thallium(I) chloride TlCl 1.7 × 10
–4
Thallium (I) iodide TlI 6.5 × 10
–8
Thallium(III) hydroxide Tl(OH)
3
6.3 × 10
–46
Tin(II) hydroxide Sn(OH)
2
1.4 × 10
–28
Tin(II) sulde
a
SnS 1 × 10
–26
Zinc carbonate ZnCO
3
1.4 × 10
–11
Zinc hydroxide Zn(OH)
2
1.2 × 10
–17
Zinc oxalate ZnC
2
O
4
2.7 × 10
–8
Zinc phosphate Zn
3
(PO
4
)
2
9.0 × 10
–33
Zinc sulde
a
ZnS 2 × 10
–25
a
Sulde equilibrium of the type:
MS(s) + H
2
O
(l)
M
2
+
(aq)
+ HS
(aq)
+ OH
(aq)

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