Gửi lúc - 25/02/2003 : 10:55:56
trinh bay pp hoa hoc tach rieng tung kim loai ra khoi hon hop:NaCl, CuCl2, FeCl3. yeu cau : khoi luong tung kim loai khong doi
Gửi lúc - 27/02/2003 : 10:26:24
dau` tien ta cho Fe vao` hon hop ==> tach duoc FeCl2 ==> Fe
Hon~ hop dung dich con` lai cho OH- vao` ==> CuOH ket tua? xanh ==> Cu
Con` lai trong dung dich la` Na+, Cl-, OH- ta de~ dang` tach duoc Na
Gửi lúc - 28/02/2003 : 18:50:18
PTTU~: cho dd Ba(OH)2 vao` tao 2ket tua~
CuCL2+Ba(OH)2--->BaCL2+Cu(OH)2/
2FeCL3+3Ba(OH)2--->3BaCL2+2Fe(OH)3
loc lay' ket' tua~ roi` dem dun no'ng thu duoc Fe2O3&CuO
Cu(OH)2 ---> CuO+H2O
2Fe(OH)3 ---> Fe2O3+3H2O
dd co`n lai la` Ba2+,Na+,Cl-neu cho vua` du~
hoac Ba2+,Na+,Cl-,OH-.
Ta biet BaSO4 ket tua~ BaCl2+H2SO4--->BaSO4 +2HCl
Ba(OH)2+H2SO4--->BaSO4 +2H2O
loc bo~ ket tua~ thu duoc muoi NaCl ban tu la`m nha
luu y' kl ko doi duoc hoa`n tat acquy_thienthan2002@yahoo.com
tach rieng tung kim loai
Gửi lúc - 25/02/2003 : 10:55:56 
