Photosynthesis reaction: CO₂ + H₂O C₆H₁₂O₆ + O₂ + H₂O

Balanced equation: 6CO₂ + 12H₂O C₆H₁₂O₆ + 6O₂ + 6H₂O

Step 1: Write the unbalanced equation

CO₂ + H₂O C₆H₁₂O₆ + O₂ + H₂O

Step 2: Compare the number of atoms of reactants with the number of atoms of products.

Step 3: Now, first we consider the element having unequal no. of atoms on both sides. Thus, first let us consider carbon atom. If we multiply 6 in the reactant (in CO₂), we will get the equal number of atoms as in product (in C₆H₁₂O₆)

Step 4: Write the resulting equation:

6CO₂ + H₂O C₆H₁₂O₆ + O₂ + H₂O

Step 5: Now check whether the equation is balanced or not by comparing the atoms

We find that the equation is not balanced yet. As the number of

Hydrogen and oxygen atoms are unequal on the two sides.

first balance the hydrogen atom.

Step 6: If we multiply 12 in the reactant (in H₂O) and 6 in the product (in H₂O), we will get the equal number of hydrogen atoms both sides.

Step 7: Write the resulting equation:

6CO₂ + 12H₂O C₆H₁₂O₆ + O₂ + 6H₂O

Step 8: Now check whether the equation is balanced or not by comparing the atoms.

We find that the equation is not balanced yet. As the number of oxygen atoms are unequal on the two sides.

Step 9: Now, we consider oxygen atoms. If we multiply 6 in the product (in O₂), we will get the equal number of atoms as in reactants (in 6CO₂ and 12H₂O)

Step 10: Write the resulting equation:

6CO₂ + 12H₂O C₆H₁₂O₆ + 6O₂ + 6H₂O

We find that the equation is balanced now.

Step 11: Write down the final balanced equation:

6CO₂ + 12H₂O C₆H₁₂O₆ + 6O₂ + 6H₂O