Răspuns:
Explicație: - V
acid azotic HNO3 radical azotat (NO3 ) I N
- V
acid fosforic H3PO4 radical fosfat (H2 PO4) I P
2-
( H PO4) II
3-
(PO4 ) III
- VI
sulfuric H2 SO4 radical sulfat ( HSO4) I S
2-
(SO4) II
- I
acid clorhidric HCl radical clorura (Cl ) I Cl
- II
acid sulfhidric H2 S radical sulfura ( HS ) I S
2-
( S ) II
-
radical- monovalenti : (HSO4 )
2-
radical divalenti : ( SO4)
3-
radical trivalent : (PO4)
