Table 1: Thermodynamic data for the calculation of each species in the Pb2+-I--H2O aqueous solution.

S. No. Relation Constant
1 Pb2+2I-=PbI2 9.80x10-9
2 Pb2++2OH-=Pb(OH)2 1.43x10-15
3 H2O=H++OH- 10-14