What is the Name for PbHPO4?

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Answer 1 · 2015-05-08T11:19:08

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

Notice that it contains the hydrogen phosphate anion, $H P O_{4}^{2 -}$ $HPO_4^(2-)$ , which carries a 2- charge.

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

As a result, the correct name for $P b H P O_{4}$ $PbHPO_4$ 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, $P b^{4 +}$ $Pb^(4+)$ .

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

$P b_{2} {(H P O_{4})}_{4}$ $Pb_2(HPO_4)_4$ , or $P b {(H P O_{4})}_{2}$ $Pb(HPO_4)_2$ .