PbWO4 (stolzite) solubility product? 1

[trinity74217]

Anyone can provide the solubility product (Ksp) of PbWO4, CaWO4, FeWO4 and metalic W with reference citation?

Highly appreciated

 

[25362]

Lange's Handbook of chemistry (McGraw Hill) gives the following solubility products:

CaWO₄: 8.7[×]10^-9​

PbWO₄: 4.5[×]10^-7​

 

[trinity74217]

Thank you very much, 25362. !!!

Nevertheless, the information I had in hand for Ksp of PbWO4 is a much lower value --> ten to the minus 30 sth.

Also, I have seen other reference mentioning its Ksp in the magnitude of ten to the minus eleven.

I am really confused which one is the correct value on earth.

Could you please provide any additional information? I really really appreciate your great help.

Thank you again.

 

[25362]

I cannot provide more help, only the suggestion that the reason for the discrepancies may be that tungstates and molybdates tend to form polyanions of the kind HW₆O₂₁^5- and their salts with metal cations, having smaller solubility products.