(1)
;离子键、共价键(或非极性键)
(2)FeS 2;-1
(3)Fe 2O 3+6H +==2Fe 3++3H 2O;Fe 2(SO 4) 3+6KOH=2Fe(OH) 3↓+3K 2SO 4
(4)Cu-2e=Cu 2+
(5)852