What Is the Correct Name for BaHPO3?

[greg153]

Homework Statement

Name the following compound:
BaHPO3

2. The attempt at a solution
Im confused on whether it is:
BaHPO3-->barium hydrogen phosphite?
BaHPO3-->barium phosphonate? OR
BaHPO3-->barium phosphite?

Or am i completely wrong with all 3 guesses?

 

[Gannon]

The acid would be phosphorous acid, H2PO3 (-ic would have one more hydrogen and oxygen, H3PO4). Because of this, when combined with a metal cation, the suffix becomes -ite. Barium Phosphite. Hydrogen does not need to be mentioned because it is assumed that it's an acid derivative from the suffix -ite.

 

[Borek]

The acid would be phosphorous acid, H2PO3 (-ic would have one more hydrogen and oxygen, H3PO4).

Phosphorous acid is H₃PO₃. -ic means one hydrogen less, -ous means one oxygen less.

Because of this, when combined with a metal cation, the suffix becomes -ite. Barium Phosphite. Hydrogen does not need to be mentioned because it is assumed that it's an acid derivative from the suffix -ite.

You need to mention hydrogen to be able to differentiate between Ba₃(PO₃)₂ and BaHPO₃, which will be otherwise indistinguishable.