- Zn la nguyen t6'd c 62 electron hoa tri nhom IIB.
a mol X to r 0,13 molH2 Jn 7 9
- Khi n = 1 a = 0,26 -> Mv = — = 28 : Loaị ^ 0,26 7 9 8 - K h i n = 2 -> a = 0 , 1 3 M x = — =56(Fe). ^ 0,13 • ' 46. D^p s6 dung la Ạ
Cdc phircmg trinh phan ling :
F e O+ H 2 F e + H j O (1) Fe203+3H2 -> 2Fe + 3H20 (2)
S6 mol H2O = — = 0,5 m o l ; S6' mol Fe = — = 0,4 mol
^ 1 8 56 Goi s6 mol FeO Fe203 trong X 1^ x va ỵ Goi s6 mol FeO Fe203 trong X 1^ x va ỵ
Theo (1,2): nH^o = x + 3y = 0,5 (I)
npe = x + 2 y = 0,4 (II) Giai (I) va (II) ta c6 : x = 0,2 , y = 0,1.
• ^""FeO = ^ - ^ ^ o = 66,67%.
7.47. Ddpsd'dungmB.
Cac phucmg trinh phan ihig :
Fe304 +4CO -> 3Fe + 4 C 0 2 t (1) CuO + CO -> Cu + CO2 t (2)
CO2 + CăOH)2du -> C a C O j i + H2O (3)
nCaCO, = ^ = 0,05 mol ^ Theo (1, 2, 3 ) : ncô = ncaCOj = 0.05 mol.
Goi X v^ y la s6 mol Fe304 v^ CuO c6 trong h6n hop. Theo (1,2): ncô = 4x + y = 0,05 (I)
mpe + mcu = 56.3.x + 64y = 2,32 (II) Giai (I) va (II) ta c6 : x = y = 0,01.
^ m = 0,01.(232 + 80) = 3,12 gam.
7.48. D^psd'dung inc. /
Cdc phuong trinh phan ling :
7.49. FeO + CO -> Fe + CO2 t (1) FeO + CO -> Fe + CO2 t (1) Fe203 + 3 C 0 2Fe + 3 C 0 2 t (2) 9 94 ': i S6'molCO= — = 0 , l m o l . 22,4
Gpi X va y in s6' mol FeO va Fe203 c6 trong h6n hop. Theo(l,2): nco = x + 3y = 0,l (I)
mpeo + mpejO, = 72.x + 160y = 6,64 (II) Giai (I) va (II) ta CO : x = 0,07, y = 0,01.
npe = X + 2y = 0,07 + 0,01. 2 = 0,09 mp^ = 0,09.56 = 5,04 gam. Dap in dung Ik D.
X + nHCl ^ XCln + 0,5nH2t (n la h6a tri cua x). Theo phuong trinh phan utig :
„ .v,«i u "I
0,03 1 mol X pha n ling tao ra 0,5.n mol H2 1 mol X pha n ling tao ra 0,5.n mol H2
0 336