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o(,1D1H(_9@0;I<AB**989<-,3*\*98H18C>>"ƒ*980
;I  "(  ?*    -  `  1.    2H  ,  (  ,  Cp  C*
{F  '  V  V
nH%*4c<"(B*<1**1g*`I2"*$6B*82"</*98,<
<-`E13**98,H?*3**B<pV.1>1>,J9`*10)</%*98
\  G5  =
o*H.=1o*O<*198*;->E*`*(",9*cF('K*1HI,02w

0  "  ‚  R    ]
{T3*E9*<2?++,03*1o*O.C@V<0!C*g(
v  ?*  (*  1.  \  2"    *t  +*  /  -  3*  H  Co  %  J    .*    1
!09*3**8-3*H2H2"m)*9819@wC1="<u("-
"H,)C]!T*,1bC,(C(,=2OuB<"<"1V2"$96*3*0
04R19@2C*o9A^:1]7*1(H],Co:;2c,2"'<"Co:
:2H,*VV<"bd!T*Q*1=O*100(H/0B"\);C8^
5
•3*1e*(3J(""<u,3*]<J<H*!302"*<"J3*
(0(.0<"(D+„"*]•
m%-19@0"~I1]!C*g*<$96*&CC96*-033**'1(H,:
    ;.  E  ]  !T*  (^  •$96*    C:•
a9*10]+(((0$96*1e6***$.C2"!T**w(A3*-V*
$96*,  0  3    V  <A    d*  <  .  o*  (  Co  "  d  .  p  0    0  
!02"3:6!12H,31o*Ob*VmA1]*B*98\2"-<<6<DB*
<1D*(";e),Co+t!T*?*19@p/$96*<D3*<,*1<"B*
(*  9A  ]  
3*H+*`("R‚R101(H-2d*!C*2H.*92w1E-
az3*-$96*-!T**-(,d0I%-<A<@(92"0
$96*  J  3*  (  *8    +  (    <  )  1'  3  C  2"  Cd  1T
_*CE96<d2H-<@.=2H^C*1=,;R9A(12",1(HCgB*2I
  6  d  1  +  9    <A  .*,  2"  !C*  "*  .  R
a9*?*Q*.A*1=*-<$96*<tC1(%<C(**1,3*(*8-3
1  2"  <D  )
m)2],$96**%1(!C*`2H3*-2"*89*ƒ2"1*V!T*!3*19@(<D
0!C*(*<*G3*,106%b*V-<@<"!T*1**o`1.…-;'
<D  "  2d*  !C*  *U  **  C>  E
_I*„*8E,$96*<DA",<g4*;'1eRo*()9R1R]!C*1e*"(2^
•†&*,(`2H3*-2"<,.C2Hbd<A7*1-`"•$6*z*"*9*Co
$96*  =  C  %  -


HCl → H
+
+ Cl
-VD1:Cho 2,81 g hỗn hợp Fe
2
O
3
, ZnO, MgO tác dụng vừa đủ với 500 ml dung dịch H
2
SO
4
0,1M.
Khối lượng muối sunfat tạo ra trong dung dịch là:
Giải: nH
2
SO
4
=0,05 = n SO
4
2-
--->nH
+
= 0,1
2H
+
+ O

x
O
y
→ b mol
n
O
2-
= 3a+ by → 2H
+
+ O
2-
→ H
2
O
6a+2yb ← 3a+yb
VD2:Hoà tan 2,4 g một oxit sắt vừa đủ 90ml ddHCl 1M. Công thức của oxit sắt nói trên là:
Gọi CTPT oxit sắt là:FexOy→ a mol
nHCl =0,09mol
2H
+
+ O
2-
→ H
2
O
0,09 0,045 mol
nO
2-
=ay = 0,045 (1)
56a + 16ya = 2,4 (2)

7
m
muối
= m
Kim Loại
+ m
gốc axít
m
M
2H
+
+ O
2-
→ H
2
O

H
+
+ OH
-
→ H
2
O
nH
+
+ M→ M
n+
+ n/2
H


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