| Người gửi |
 Topic  |
|
|
salem85
27 Posts
|
 Posted - 25/02/2003 : 10:58:54  
|
neu phuong phap dieu che K tu dd K2SO4
|
|
|
datacnhang
2 Posts
|
Posted - 26/02/2003 : 08:54:35
|
Theo toi ban nen cho K2SO4 + BaCl2 =2KCl + BaSO4(kt),
ban loc KCl roi dem DP nong chay se duoc K nguyen chat
Chuc ban vui ve
|
|
|
|
salem85
27 Posts
|
Posted - 26/02/2003 : 11:37:38
|
neu ban lam nhu vay thi neu BaCl2 du thi san pham thu duoc se la hon hop 2 kim loai K va Ba
|
|
|
|
|
tdk
Vietnam
2 Posts
|
Posted - 27/02/2003 : 10:38:37
|
Muon dieu che kim loai Fe(sat) co bao nhieu cach.Nhung cach ay la nhung cach nao.Xin cam on
khai |
|
|
|
|
might
14 Posts
|
Posted - 15/03/2003 : 15:09:28
|
dieu che Fe chieu cach lam cu the la tu chat gi?
|
|
|
|
|
Quanghuy0992
Posts
|
Posted - 16/03/2003 : 09:17:10
|
Hi Salem!Ban muon dieu che K tu Sulphat Potassium u?
Ban cho vao dung dich AgNO3(NitratAgerium) hayPb(NO3)2 (NitratPlumbium).Dd se co ket tua(loc bo di),KNO3,Ag+ hay Pb++ du.Hay co can dung dich ,roi nung nong(nhiet phan)hon hop do,ban biet rang miou Nitrat thi rat de bi nhiet phan.Sau khi nhiet phan,ban se co KNO2,Ag(hay PbO).Bo het vao nuoc,bo chat khong tan,ban chi con KNO2,cho Hcl vao ,co cancho den khi khong con khi thoat ra ,ban se co KCL nguyen chat.BAn biet phai lam gi sau do ma.Chuc ban vui.
|
|
|
|
| |
Topic |
|
|
|
dieu che kim loai