*UPDATED* For 2022-23 Boards Exam
SHOBHIT NIRWAN's
DESIGNED
CHEMICAL REACTIONS
AND EQUATIONS
NOTES
, Word Equation
Balanced Chemical Equation:
Lallu Problem (L.P.) : Balance: Fe + H2O ⟶ Fe3O4 + H2
Step 1: Check the number of atoms of each element on the reactants and products side
of the equation :
Step 2: First of all, to balance oxygen atoms we multiply H2O molecules by 4.
Fe + 4(H2O) ⟶ Fe3O4 + H2
Step 3: Once again check the number of atoms of each element on both sides.
, Step 4: Balancing Hydrogen atom by multiplying H2 with 4 ( 4H2 ⟶8 atoms)
Fe + 4(H2O) ⟶ Fe3O4 + 4(H2)
Now,
Step 5: Balancing Fe by multiplying by 3 on LHS
3(Fe) + 4(H2O) ⟶ Fe3O4 + 4(H2)
We can see,
Hence the equation is balanced!
L.P. : Some equations you should practice balancing: (Most likely equations)
1. ZnCO3 ⟶ ZnO + CO2
2. Pb(NO3)2 + KI ⟶ KNO3 + PbI2
3. CO(g) + O2(g) ⟶ CO2(g)
4. FeSO4(s) ⟶ Fe2O3(s)+SO2(g)+SO3(g)
5. Al + H2SO4⟶ AL2(S04)3 + H2
6. Zn + HNO3 ⟶ Zn(NO3)2 + H2O + N2O
1. Already Balanced (LOL!)
2. Pb(NO3)2 + 2KI ⟶ 2KNO3 PbI2
3. 2CO(g) + O2(g) ⟶ 2CO2(g)
4. 2FeSO4(s) ⟶ Fe2O3(s)+SO2(g)+SO3(g)
5. 2Al + 3H2SO4⟶ AL2(S04)3 + 3H2
6. 4Zn + 10HNO3 ⟶ 4Zn(NO3)2 + 5H2O + N2O
Kuch Kaam Ki Baat (K3B) :
SHOBHIT NIRWAN's
DESIGNED
CHEMICAL REACTIONS
AND EQUATIONS
NOTES
, Word Equation
Balanced Chemical Equation:
Lallu Problem (L.P.) : Balance: Fe + H2O ⟶ Fe3O4 + H2
Step 1: Check the number of atoms of each element on the reactants and products side
of the equation :
Step 2: First of all, to balance oxygen atoms we multiply H2O molecules by 4.
Fe + 4(H2O) ⟶ Fe3O4 + H2
Step 3: Once again check the number of atoms of each element on both sides.
, Step 4: Balancing Hydrogen atom by multiplying H2 with 4 ( 4H2 ⟶8 atoms)
Fe + 4(H2O) ⟶ Fe3O4 + 4(H2)
Now,
Step 5: Balancing Fe by multiplying by 3 on LHS
3(Fe) + 4(H2O) ⟶ Fe3O4 + 4(H2)
We can see,
Hence the equation is balanced!
L.P. : Some equations you should practice balancing: (Most likely equations)
1. ZnCO3 ⟶ ZnO + CO2
2. Pb(NO3)2 + KI ⟶ KNO3 + PbI2
3. CO(g) + O2(g) ⟶ CO2(g)
4. FeSO4(s) ⟶ Fe2O3(s)+SO2(g)+SO3(g)
5. Al + H2SO4⟶ AL2(S04)3 + H2
6. Zn + HNO3 ⟶ Zn(NO3)2 + H2O + N2O
1. Already Balanced (LOL!)
2. Pb(NO3)2 + 2KI ⟶ 2KNO3 PbI2
3. 2CO(g) + O2(g) ⟶ 2CO2(g)
4. 2FeSO4(s) ⟶ Fe2O3(s)+SO2(g)+SO3(g)
5. 2Al + 3H2SO4⟶ AL2(S04)3 + 3H2
6. 4Zn + 10HNO3 ⟶ 4Zn(NO3)2 + 5H2O + N2O
Kuch Kaam Ki Baat (K3B) :
