Ngày tải lên :
03/02/2015, 01:00
... dung dch NaOH 1M tỏc dng vi 200 ml dung dch H3PO4 0,5M, mui thu c cú lng l A 14,2 gam B .15, 8 gam C.16,4 gam D .11, 9 gam 2+ 2+ 2+ Cõu 33 : Dung dch A cú cha : Mg , Ba ,Ca , v 0,2 mol Cl , 0,3 mol NO3-.Thờm ... C,P,N,S,Cl,F C P,C,N,S,F,Cl D C,N,P,S,Cl,F Cõu 41: Tỡm cu hỡnh electron vit sai A Na+ (Z =11) 1s22s22p63s2 B Na (Z =11) 1s22s22p63s1 C F ( = 9) 1s22s22p5 D F-(Z=9) 1s22s22p6 Cõu 42: Ion X2- cú cu hỡnh ... cho vo 100ml dung dch hn hp gm HNO3 v HCl cú pH = 1, thu c dung dch cú pH =2 l A 0,224 lớt B 0 ,15 lớt C.0,336 lớt D 0,448 lớt Cõu 31: Trn ln dd H2SO4 0,1M; HNO3 0,2M v HCl; 0,3M vi nhng th tớch...