Balancing Chemical Equations is one of the most important topics in Chemistry for Class 9,10,11,12 of CBSE, RBSE and NIOS board examinations. Students often struggle with balancing reactions using the Hit and Trial method. In this post, you will find 100 examples of balanced chemical equations with answers arranged from easy to difficult level for practice and exam preparation.
Earlier this post had 50 examples, now the post has been updated with 100 examples as per student’s demand so now you will find 100 examples of balanced chemical equations with answers for practice and exam preparation.
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These examples include decomposition, displacement, combination and neutralization and redox reactions to help you master the concept easily. There are different methods of balancing a chemical equation. We have already discussed hit and trial method. Today we will go through some examples of balanced chemical equations with answers.
Examples of Balanced Chemical Equations (1-50)
1.CH4 +O2 → CO2 + H2O
Ans- CH4 +O2 → CO2 + 2H2O
2.Na+ H2O → NaOH + H2
Ans- 2Na+ 2H2O → 2NaOH + H2
3.Fe2O3 + HCl → FeCl2 + H2O
Ans- Fe2O3 + 6HCl → 2FeCl2 +3 H2O
4.C2H6+ O2 → CO2 + H2O
Ans- 2C2H6+ 7O2 → 4CO2 + 6H2O
5.Fe+ O2 →Fe2O3
Ans- 4Fe+ 3O2 →2Fe2O3
6.KClO3 →KCl + O2
Ans- 2KClO3 →2KCl + 3O2
7.Fe + H2O →Fe3O4 + H2
Ans- 3Fe + 4H2O →Fe3O4 + 4H2
8.KMnO4 +HCl →KCl + MnCl2+ H2O+ Cl2
Ans- 2KMnO4 +16 HCl →2KCl + 2MnCl2+ 8H2O+ 5Cl2
9.KOH+ H2SO4 →K2SO4 + H2O
Ans- 2KOH+ H2SO4 →K2SO4 + 2H2O
10.Al(OH)3+ H2SO4 →Al2(SO4)3+ H2O
Ans- 2Al(OH)3+ 3H2SO4 →Al2(SO4)3+ 6H2O
11.KNO3 →KNO2 + O2
Ans- 2KNO3 →2KNO2 + O2
12.Al + O2→ Al2O3
Ans- 4Al + 3O2→ 2Al2O3
13.HNO3+Ca(OH)2 →Ca(NO3)2+ H2O
Ans- 2HNO3+Ca(OH)2 →Ca(NO3)2+ 2H2O
14.NaOH+ H2SO4 →Na2SO4+ H2O
Ans- 2NaOH+ H2SO4 →Na2SO4+ 2H2O
15.NaCl+ AgNO3→AgCl + NaNO3
Ans- NaCl+ AgNO3→AgCl + NaNO3
16.BaCl2+ H2SO4 →BaSO4 + HCl
Ans- BaCl2+ H2SO4 →BaSO4 + 2HCl
17.Ca(OH)2+CO2 →CaCO3+ H2O
Ans- Ca(OH)2+CO2 →CaCO3+ H2O
18.Zn+ AgNO3 →Zn(NO3)2 + Ag
Ans- Zn+ 2AgNO3 →Zn(NO3)2 + 2Ag
19.Al+CuCl2 →AlCl3+ Cu
Ans- 2Al+3CuCl2 →2AlCl3+ 3Cu
20.BaCl2 +K2SO4→BaSO4+KCl
Ans- BaCl2 +K2SO4→BaSO4+2KCl
21.KBr + BaI2→ KI + BaBr2
Ans- 2KBr + BaI2 →2KI + BaBr2
21.ZnCO3 →ZnO +CO2
Ans- ZnCO3 →ZnO +CO2
22.H2+ Cl2 →HCl
Ans- H2+ Cl2 →2HCl
23.Mg +HCl →MgCl2+ H2
Ans- Mg +2HCl →MgCl2+ H2
24.AgBr →Ag+ Br2
Ans- 2AgBr →2Ag+ Br2
25.AgCl →Ag + Cl2
Ans- 2AgCl →2Ag + Cl2
26.Pb(NO3)2→PbO +NO2+O2
Ans- 2Pb(NO3)2→2PbO +4NO2+O2
27.FeSO4 → Fe2O3 +SO2 + SO3
Ans- 2FeSO4 → Fe2O3 +SO2 + SO3
28.H2S + Cl2→S + HCl
Ans- H2S + Cl2→S + 2HCl
29.Ba(OH)2 + HBr →BaBr2 + H2O
Ans-Ba(OH)2 + 2HBr →BaBr2 + 2H2O
30.KCN+ H2SO4 →K2SO4 + HCN
Ans- 2KCN+ H2SO4 →K2SO4 + 2HCN
31.Al + HCl →AlCl3 + H2
Ans- 2Al + 6HCl →2AlCl3 + 3H2
32.HgCl2 + SnCl2 → Hg2Cl2 + SnCl4
Ans- HgCl2 + SnCl2 → Hg2Cl2 + SnCl4
33.PbO2 + H2SO4 →PbSO4+ H2O+O2
Ans- 2PbO2 + 2H2SO4 →2PbSO4+ 2H2O+O2
34.Al + Fe2O3→Al2O3 + Fe
Ans- 2Al + Fe2O3→Al2O3 + 2Fe
35.N2 + 3H2 →NH3
Ans- N2 + 3H2 →2NH3
36.NH3+ HCl →NH4Cl
Ans- NH3+ HCl →NH4Cl
37.H2O →H2 + O2
Ans- 2H2O →2H2 + O2
38.NH4Cl →NH3 + HCl
Ans- NH4Cl →NH3 + HCl
39.NH3+ H2O →NH4OH
Ans- NH3+ H2O →NH4OH
40.Zn +H2SO4 →ZnSO4 +H2
Ans- Zn +H2SO4 →ZnSO4 +H2
41.BaCl2 + ZnSO4 →ZnCl2 + BaSO4
Ans- BaCl2 + ZnSO4 →ZnCl2 + BaSO4
42.NH3 + H2SO4 →(NH3)2SO4
Ans- 2NH3 + H2SO4 →(NH3)2SO4
43.CuO + H2 →Cu + H2O
Ans- CuO + H2 →Cu + H2O
44.NH4NO2 →H2O + N2
Ans- NH4NO2 →2H2O + N2
45.NaBr + Cl2 →NaCl + Br2
Ans- 2NaBr + Cl2 →2NaCl + Br2
46.MgO + C →CO2 + Mg
Ans- 2MgO + C → 2Mg + CO2
47.CaCO3 + HCl →CaCl2 + H2O +CO2
Ans- CaCO3 + 2HCl →CaCl2 + H2O +CO2
48.Al2O3 + H2SO4 →Al2(SO4)3 + H2O
Ans- Al2O3 + 3H2SO4 →Al2(SO4)3 + 3H2O
49.Al2(SO4)3+ NaOH →Al(OH)3 + Na2SO4
Ans- Al2(SO4)3+ 6NaOH →2Al(OH)3 + 3Na2SO4
50. C+ O2 →CO2
Ans – C+ O2 →CO2
More Balanced Chemical Equations (51 – 100)
51. N2 +O2 →NO
Ans- N2 +O2 →2NO
52.NO +O2 →NO2
Ans – 2NO +O2 →2NO2
53. SO2 +O2 →SO3
Ans- 2SO2 +O2 →2SO3
54. P + O2 →P2O5
Ans- 4P + 5O2 → 2P2O5
55. C+ H2 →CH4
Ans- C+ 2H2 →CH4
56. CO + O2 → CO2
Ans- 2CO + O2 → 2CO2
57. Na+ Cl2 →NaCl
Ans- 2Na+ Cl2 →2NaCl
58. K + Cl2→KCl
Ans- 2K + Cl2→2KCl
59. Ca + O2 → CaO
Ans- 2Ca + O2 → 2CaO
60. Mg + N2 →Mg3N2
Ans- 3Mg + N2 →Mg3N2
61. H2O2 →H2O + O2
Ans- 2H2O2 →2 H2O + O2
62. Na2O +H2O →NaOH
Ans- Na2O +H2O →2NaOH
63. CaO + H2O →Ca(OH)2
Ans- CaO + H2O →Ca(OH)2
64. CO2 + H2O →H2CO3
Ans- CO2 + H2O →H2CO3
65. NH3 + O2 →NO + H2O
Ans- 4NH3 + 5O2 → 4NO + 6H2O
66. Na2CO3 + HCl → NaCl +H2O + CO2
Ans- Na2CO3 + 2HCl → 2NaCl +H2O + CO2
67. K2CO3 + HCl → KCl + H2O + CO2
Ans- K2CO3 + 2HCl → 2KCl + H2O + CO2
68. CaCO3 → CaO + CO2
Ans- CaCO3 → CaO + CO2
69. NH4NO3 → N2O + H2O
Ans- NH4NO3 → N2O + 2H2O
70. NaHCO3 → Na2CO3 + H2O + CO2
Ans- 2NaHCO3 → Na2CO3 + H2O + CO2
71. Cu + AgNO3 →Cu(NO3)2 + Ag
Ans- Cu + 2AgNO3 →Cu(NO3)2 + 2Ag
72. Fe + CuSO4 →FeSO4 + Cu
Ans- Fe + CuSO4 →FeSO4 + Cu
73. Zn + CuCl2 → ZnCl2 +Cu
Ans- Zn + CuCl2 → ZnCl2 +Cu
74. Pb +AgNO3 →Pb(NO3)2 +Ag
Ans- Pb + 2 AgNO3 → Pb(NO3)2 + 2Ag
75. Al + FeCl3 → AlCl3 +Fe
Ans- Al + FeCl3 → AlCl3 +Fe
76.Na2SO4 + BaCl2 →BaSO4 + NaCl
Ans- Na2SO4 + BaCl2 →BaSO4 + 2NaCl
77. KCl + AgNO3 →AgCl + KNO3
Ans- KCl + AgNO3 →AgCl + KNO3
78. CaCl2 + Na2CO3 → CaCO3 + NaCl
Ans- CaCl2 + Na2CO3 → CaCO3 + 2NaCl
79. Pb(NO3)2 + KI → PbI2 + KNO3
Ans- Pb(NO3)2 + 2KI → PbI2 + 2KNO3
80. FeCl3 +NaOH → Fe(OH)3 +NaCl
Ans- FeCl3 +3NaOH → Fe(OH)3 + 3NaCl
81. AlCl3 +NaOH →Al(OH)3 + NaCl
Ans- AlCl3 + 3NaOH →Al(OH)3 + 3NaCl
82. CuSO4 + NaOH → Cu(OH)2 + Na2SO4
Ans- CuSO4 + 2NaOH → Cu(OH)2 + Na2SO4
83. H3PO4 + NaOH → Na3PO4 + H2O
Ans- H3PO4 + 3NaOH → Na3PO4 + 3H2O
84. H2CO3→ H2O + CO2
Ans- H2CO3 → H2O + CO2
85. (NH4)2Cr2O7 → Cr2O3 +N2 + H2O
Ans – (NH4)2Cr2O7 → Cr2O3 +N2 + 4H2O
86. C2H2 + O2 → CO2 +H2O
Ans- 2 C2H2 + 5O2 → 4CO2+ 2H2O
87. C3H8 + O2 → CO2 +H2O
Ans- C3H8 + 5O2 → 3CO2 + 4H2O
88. C4H10 + O2 → CO2 + H2O
Ans- 2C4H10 + 13 O2 → 8CO2 + 10 H2O
89. C2H4 + O2 → CO2 +H2O
Ans- C2H4 + 3O2 → 2CO2 + 2H2O
90. C6H6 +O2 → CO2 + H2O
Ans- 2C6H6 + 15 O2 → 12 CO2 + 6H2O
91. Si + O2 → SiO2
Ans- Si + O2 → SiO2
92. Fe + S → FeS
Ans- Fe + S → FeS
93. Na + O2 → Na2O
Ans- 4Na + O2 → 2Na2O
94. K + O2 → K2O
Ans- 4K + O2 → 2K2O
95. Ca + Cl2 → CaCl2
Ans- Ca + Cl2 → CaCl2
96. H2 + S → H2S
Ans- H2 + S → H2S
97. PCl5 +H2O → H3PO4 + HCl
Ans- PCl5 + 4H2O → H3PO4 + 5HCl
98. SO3 + H2O → H2SO4
Ans- SO3 + H2O → H2SO4
99. N2O5+ H2O → HNO3
Ans- N2O5 + H2O → 2HNO3
100. Cl2 +H2O→ HCl + HClO
Ans- Cl2 +H2O → HCl + HClO
So, learn these examples of balanced chemical
equations for your board exams. You can also learn Hit and Trail method to
balance the chemical equations.
Practice Questions (Try Yourself)
Balance these equations
1. P+ O2 →P2O5
2. Cu+ HNO3 →Cu(NO3)2 + NO2 + H2O
3. Na+ O2 →Na2O
4. Fe+ Cl2 →FeCl3
5. C2H4 + O2 →CO2 + H2O
Frequently Asked Questions
Q1. Why is balancing chemical equation important?
Answer – A chemical equations is balanced because of the law of conservation of mass.
Q2. Which method is easiest to balance equations?
Answer- Hit and trial method is the easiest method to balance equations.
Q3. Which class studies balancing equations?
Answer- Class 9 ,10,11,12 of RBSE , CBSE and NIOS board
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