2.x là số mol CuCl2, 3x là số mol FeCl3(theo tỉ lệ 1:3)
CuO+2HCl->CuCl2+H20
x........2x........<-x
Fe2O3+6HCl->2FeCl3+3H2O
1,5x..... 9x.......<-.3x
Có
Có 80x+160.1,5x=4,8
=>x=0,015
nHCl=2.0,015+9.0,015=0,165mol
VddHCl=0,165/0,5=0,33(l)
- cho h2o vào
+ tan: CaO, FeCl2
CaO+H20->Ca(OH)2(1)
+ ko tan: caco3, sio2(2)
- cho dd hcl du vào (2)
+ tạo kt trắng. Sio2 ko td, lọc thu dc sio2
Caco3+hcl->cacl2+h20+co2
- cho dd na2co3 dư vào dd . lọc thu dc caco3
Na2co3+cacl2->nacl+caco3
- cho Co2 dư vào nhóm (1)
+ tạo kt trang : cao. Lọc thu...
1. Tom started working for this electronics firm in 1999
2. Mr.Tuan started teaching in this college in 1989
3. This is the first time I've ever seen snow
4. My grandfather has never been in hospital before
5. I haven't played football for 10 years.
6. I haven't gone to see them for over a years