What is the Name for PbHPO4?

May 8, 2015

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

Notice that it contains the hydrogen phosphate anion, $H P {O}_{4}^{2 -}$, which carries a 2- charge.

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

As a result, the correct name for $P b H P {O}_{4}$ 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, $P {b}^{4 +}$.

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

$P {b}_{2} {\left(H P {O}_{4}\right)}_{4}$, or $P b {\left(H P {O}_{4}\right)}_{2}$.