Lớp 10 nâng cao
CHƯƠNG 4 PHẢN ỨNG OXI HOÁ KHỬ
Bài 1: Cân bằng các phương trình dưới đây bằng phương pháp cân bằng electron
1. NH
4
NO
3
→ N
2
O + H
2
O
2. KBrO
3
→ KBr + KBrO
2
3. KClO
3
→
KCl + O
2
4. KNO
3
→ KNO
2
+ O
2
5. NH
4
NO
2
→ N
2
+ H
2
O
6. NH
3
+ O
2
→ N
2
+ H
2
O
7. H
2
S + O
2
→ SO
2
+ H
2
O
8. NH
3
+ O
2
→ NO + H
2
O
9. KMnO
4
→ K
2
MnO
4
+ MnO
2
+ O
2
10. I
2
+ Na
2
S
2
O
3
→ Na
2
S
4
O
6
+ NaI
11. P + KClO
3
→
P
2
O
5
+ KCl
12. HNO
2
→ HNO
3
+ NO + H
2
O
13. HNO
3
→ NO
2
+ O
2
+ H
2
O
14. H
2
S + Cl
2
+ H
2
O → H
2
SO
4
+ HCl
15. Cu + H
2
SO
4
→ CuSO
4
+ SO
2
+ H
2
O
16. HNO
3
+ H
2
S → S + NO + H
2
O
17. HNO
3
+ Mg→ Mg(NO
3
)
2
+ NO + H
2
O
18. KNO
3
+ FeS → KNO
2
+ Fe
2
O
3
+ SO
3
19. HNO
3
+ H
2
S → NO + S + H
2
O
20. Br
2
+ KOH
→
KBr + KBrO + H
2
O
21. Al + H
2
SO
4
→
Al(SO
4
)
3
+ S + H
2
O
22. S + KOH →
K
2
SO
4
+ K
2
S + H
2
O
23. Cl
2
+ KOH → KCl + KClO
3
+ H
2
O
24. Cl
2
+ NaOH
→
NaCl + NaClO + H
2
O
25. Mg + HNO
3
→ NO + Mg(NO
3
)
2
+ H
2
O
26. NO
2
+ NaOH → NaNO
2
+ NaNO
3
+ H
2
O
27. S + KOH → K
2
S + K
2
SO
3
+ H
2
O
28. P + KOH + H
2
O → KH
2
PO
4
+ PH
3
29. Br
2
+ NaOH
→
NaBr + NaBrO
3
+ H
2
O
30. Zn + HNO
3
→ Zn(NO
3
)
2
+ NH
4
NO
3
+ H
2
O
31. P + HNO
3
(loãng )+ H
2
O → H
3
PO
4
+ NO
32. P + H
2
SO
4
(đ)
→
H
3
PO
4
+ SO
2
+ H
2
O
G.Nhp
Lớp 10 nâng cao
33. MnO
2
+ HCl → MnCl
2
+ Cl
2
+ H
2
O
35. Cu + HNO
3
(l) → Cu(NO
3
)
2
+ NO + H
2
O
36. Zn + HNO
3
(l) → Zn(NO
3
)
2
+ NO
2
+ H
2
O
37. Al + H
2
SO
4
(đ)
→
Al
2
(SO
4
)
3
+ SO
2
+ H
2
O
38. Al + H
2
SO
4
(đ) → Al
2
(SO
4
)
3
+ S ↓ + H
2
O
39. Al + H
2
SO
4
(đ) → Al
2
(SO
4
)
3
+ H
2
S ↑ + H
2
O
40. Al + HNO
3
(
l)
→
Al(NO
3
)
3
+ N
2
+ H
2
O
41. Al +HNO
3
(l) → Al(NO
3
)
3
+ NH
4
NO
3
+ H
2
O
42. FeO + HNO
3
(l)
→
Fe(NO
3
)
3
+ NO + H
2
O
43. Fe
3
O
4
+ HNO
3
(l) → Fe(NO
3
)
3
+ NO + H
2
O
44. Fe(NO
3
)
2
+HNO
3
(l)
→
Fe(NO
3
)
3
+ NO + H
2
O
45. PbO + NH
3
→ Pb + N
2
+ H
2
O
46. KClO
3
+ HBr
→
KCl + Br
2
+ H
2
O
47. H
2
S + HNO
3
→ H
2
SO
4
+ NO + H
2
O
48. MnO
2
+ O
2
+ KOH → K
2
MnO
4
+ H
2
O
49. Br
2
+ Cl
2
+ H
2
O → HBrO
3
+ HCl
50. HBr + H
2
SO
4
(đ) → SO
2
+ Br
2
+ H
2
O
51. HI + H
2
SO
4
(đ)
→
H
2
S + I
2
+ H
2
O
52. FeSO
4
+ Cl
2
+ H
2
SO
4
→ Fe
2
(SO
4
)
3
+ HCl
53. KMnO
4
+ HCl → KCl + MnCl
2
+ Cl
2
+ H
2
O
54. Cu + HCl + NaNO
3
→ CuCl
2
+ NaCl + NO + H
2
O
55. CrCl
3
+ NaOCl + NaOH → Na
2
CrO
4
+ NaCl +
H
2
O
56. KMnO
4
+ HCl → MnCl
2
+ Cl
2
+ KCl + H
2
O
57. Cu+ KNO
3
+ H
2
SO
4
→
CuSO
4
+ NO + K
2
SO
4
+
H
2
O
58. KI + HNO
3
→
I
2
+ KNO
3
+ NO + H
2
O
59. K
2
Cr
2
O
7
+ HCl
→
Cl
2
+ CrCl
3
+ KCl + H
2
O
60. NaClO + KI +H
2
SO
4
→
I
2
+NaCl +K
2
SO
4
+ H
2
O
61. Cr
2
O
3
+KNO
3
+KOH
→
K
2
CrO
4
+KNO
2
+ H
2
O
62. FeSO
4
+HNO
3
+H
2
SO
4
→
Fe
2
(SO
4
)
3
+NO+ H
2
O
63. Mn(OH)
2
+ Cl
2
+ KOH → MnO
2
+ KCl + H
2
O
64. K
2
S + KMnO
4
+ H
2
SO
4
→ S + MnSO
4
+ K
2
SO
4
+ H
2
O
65. SO
2
+ KMnO
4
+ H
2
O → K
2
SO
4
+ MnSO
4
+ H
2
O
66.
KNO
2
+ KMnO
4
+ H
2
SO
4
→ K
2
SO
4
+ K
2
SO
4
+ MnSO
4
+ H
2
O
67. K
2
SO
3
+ KMnO
4
+ H
2
O → K
2
SO
4
+ MnSO
4
+ H
2
O
68.
CrCl
3
+ Br
2
+ NaOH → Na
2
CrO
4
+ NaCl + NaCl + H
2
O
69. KI + KClO
3
+ H
2
SO
4
→ Κ
2
SΟ
4
+ Ι
2
+ ΚCl + H
2
O
70. K
2
SO
3
+ KMnO
4
+ KHSO
4
→ K
2
SO
4
+ MnSO
4
+ H
2
O
71.
K
2
S + K
2
Cr
2
O
7
+ H
2
SO
4
→ S + Cr
2
(SO
4
)
3
+ K
2
SO
4
+ H
2
O
G.Nhp
Lớp 10 nâng cao
72. CuS
2
+ HNO
3
→ Cu(NO
3
)
2
+ H
2
SO
4
+ N
2
O + H
2
O
73. Al + NaNO
3
+ NaOH + H
2
O
→
NaAlO
2
+ NH
3
Bài 2: Cân bằng phản ứng oxi hoá khử có nhiều nguyên tố thay đổi số oxi hoá
1. FeS
2
+ O
2
→
Fe
2
O
3
+ SO
2
2. FeS + HNO
3
→
Fe(NO
3
)
3
+ NO + H
2
O + H
2
SO
4
3. Fe(CrO
2
)
2
+ Na
2
CO
3
→
Na
2
CrO
4
+ Fe
2
O
3
+ CO
2
4. As
2
S
3
+ HNO
3
+ H
2
O
→
H
3
AsO
4
+ H
2
SO
4
+ NO
5. CuFeS
2
+ Fe
2
(SO
4
)
3
+ O
2
+ H
2
O
→
CuSO
4
+ FeSO
4
+ H
2
SO
4
6. CrI
3
+ KOH + Cl
2
→
K
2
CrO
4
+ KIO
4
+ KCl + H
2
O
7. FeI
2
+ H
2
SO
4
→
Fe
2
(SO
4
)
3
+ SO
2
+ I
2
+ H
2
O
8. FeS
2
+ HNO
3
+ HCl
→ FeCl
3
+ H
2
SO
4
+ NO + H
2
O
9. KClO
3
+ NH
3
→ KNO
3
+ KCl + Cl
2
+ H
2
O
10.
As
2
S
3
+ KClO
3
→
H
3
AsO
4
+ H
2
SO
4
+ KCl
Bài 3: Cân bằng phản ứng oxi hoá khử dạng tổng quát
1. M
2
O
x
+ HNO
3
→ M(NO
3
)
3
+ NO + H
2
O
2.
As
2
S
3
+ HNO
3
+ H
2
O
→
H
3
AsO
4
+ H
2
SO
4
+ N
2
O
x
3. Fe
x
O
y
+ HNO
3
→ Fe(NO
3
)
3
+ NO + H
2
O
4. M + HNO
3
→ M(NO
3
)
n
+ NO + H
2
O
5. M + HNO
3
→ M(NO
3
)
3
+ N
2
O
n
+ H
2
O
6. Fe
x
O
y
+ HNO
3
→ Fe(NO
3
)
3
+ NO + H
2
O
7. Zn + HNO
3
→ Zn(NO
3
)
2
+ N
x
O
y
+ H
2
O
8.
Fe
x
O
y
+ H
2
SO
4
→ Fe
2
(SO
4
)
3
+ SO
2
+ H
2
O
9. Al +
Fe
x
O
y
→ Fe + Al
2
O
3
10. Fe
x
O
y
+ CO → Fe + CO
2
.
Bài 4: Cân bằng phương trình phản ứng dưới dạng ion
1. Mn
2+
+ H
2
O
2
+ OH
-
→ ΜnO
2
+ H
2
O
2. Ag + NO
3
-
+ H
+
→ Ag
+
+ NO + H
2
O
3. IO
3
-
+ I
-
+ H
+
→ I
2
+ H
2
O
4. MnO
4
-
+ Cl
-
+ H
+
→ Mn
2+
+ Cl
2
+ H
2
O
5. Cr
3+
+ ClO
3
-
+ OH
-
→ CrO
4
2-
+ Cl
-
+ H
2
O
G.Nhp