What is the Name for PbHPO4?

1 Answer
May 8, 2015

Actually, that compound is lead (II) hydrogen phosphate, not lead (IV) hydrogen phosphate.

Notice that it contains the hydrogen phosphate anion, HPO_4^(2-), which carries a 2- charge.

http://www.chemistry.wustl.edu/~edudev/LabTutorials/PeriodicProperties/Ions/ions.html

This implies that the lead cation is in a +2 oxidation state, so you're actually dealing with the lead (II) cation, Pb^(2+).

As a result, the correct name for PbHPO_4 is lead (II) hydrogen phosphate.

Lead (IV) hydrogen phosphate will have the lead cation in a +4 oxidation state, so you'd be dealing with the lead (IV) ion, Pb^(4+).

As a result, lead (IV) hydrogen phosphate would be

Pb_2(HPO_4)_4, or Pb(HPO_4)_2.