... sau: PO 3-4 , HPO 2-4 v H2PO-4 S sp xp no sau õy ỳng vi trỡnh t tng dn v tớnh baz ca cỏc ion ú A H2PO-4 < PO 3-4 < HPO4 2- B H2PO-4 < HPO 2-4 < PO 3-4 C HPO4 3- < HPO4 2-HPO 2-4 >PO 3-4 Cõu ... Cl- , SO4 2- , NO 3- (II): Na+ , K+ , Fe3+ , SO4 2- , Cl- , OH- ; (III): Ca2+ , Mg2+ , Al3+ , SO3 2- , Br- , NO 3- ; (V): Fe2+ , Fe3+ , Na+ , Cl- , SO4 2- , I- ; (IV): Na+ , K+ , Al3+ , SO4 2- , HCO 3- ... hiu: - Khỏi nim v s in li, cht in li, cht in li mnh, cht in li yu, cõn bng in li - Phõn bit c cht in li, cht khụng in li, cht in li mnh, cht in li yu - Bn cht ca phn ng xy dung dch cỏc cht in li...