Raderford was first:
I got Pb(OH)2·PbCO3 or (PbOH)2CO3, not quite sure .
No matter how you write it, this is the intended answer.
And I should slap myself again, as I have not checked details. Problem was used in a chemistry competition, and after solving and checking that the numbers are OK I assumed the compound is just a basic lead carbonate. Turns out it is not - so called white lead has a slightly different formula (2PbCO3
). It doesn't mean Pb(OH)2
doesn't exist, as there are several similar compounds, but I prefer problems with the obviously existing real solutions.