... HNO3 loóng d thu c dd A Dung dch A cha: A Fe2+, SO4 2-, NO 3-, H+ B Fe2+, Fe3+, SO4 2-, NO 3-, H+ 3+ 2+ C Fe , SO4 , NO3 , H D Fe2+, SO3 2-, NO 3-, H+ Cõu 61 Cho cỏc cht Cu, Fe, Ag v cỏc dung dch HCl, ... Fe(NO3)2 D Fe(NO3)2 ,Fe(NO3)3 Cõu 56 Hn hp kim loi no sau õy tt c u tham gia phn ng trc tip vi mui st (III) dung dch ? A Na, Al, Zn B Fe, Mg, Cu C Ba, Mg, Ni D K, Ca, Al Cõu 57 Khi cho số mol kim loại ... 4,48 l D 6,72 l Bi 12 Hũa tan ht m(g) hn hp Al v Fe lng d dung dch H 2S04 loóng thoỏt 0,4 mol khớ, cũn lng d dung dch NaOH thu c 0,3 mol khớ giỏ tr m ó dựng l : A 11,0 g B 12, 28g C.13,7g D.19,5g...