the -3 is the valence of the phosphate ion.
phosphite ion is PO3 ^-3
Hydrogen Phosphate? H3PO4
I'm having a difficult time understanding phosphorous-containing ions. For example, phospate is written as PO4 with 3- on top. I don't know what the 4 or 3- stand for. Please explain? Also if you could help me find out the symbols for phophite and hydrogen phospate I'd really apprectiate it. Thanks!
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Thank you very much for your help.
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