Civil Engineering Reference
In-Depth Information
TABLE5-5.TypicalSolubility-ProductConstants
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(From Sawyer, C. N., McCarty, P. L., and Parkin, G. L.,
Chemistry for Environmental Engineering,
4th ed.,
1994. Reproduced with permission of The McGraw-Hill Book Companies.)
*See Reference 1.
TABLE 5-6. Additional Solubility-Product Constants
Compound
K
sp
at 25
C
Carbonates
CaCO
3
(calcite)
4.6
10
9
CaCO
3
(aragonite)
6.0
10
9
MgCO
3
1.0
10
5
Hydroxides
Mg(OH)
2
1.8
10
11
Pb(OH)
2
5.0
10
15
Phosphates
AlPO
4
1.0
10
21
MgNH
4
PO
4
2.5
10
13
Sulfates
CaSO
4
2.6
10
5
PbSO
4
1.6
10
8
Sulfides
ZnS
3.1
10
22
FeS
5.0
10
18
Fe
2
S
3
1.0
10
88
Source:
Adapted from Reference 2.
