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Nov12-03, 09:21 AM
Sci Advisor
ShawnD's Avatar
P: 986
The PO4 is not separated from the H2 because H2PO4 is itself a polyatomic ion.

HCN and HNO3 separate because they are not polyatomic ions; they are simply acids just as you said :).

Here is a list of polyatomic ions for future referance