Al + CuCl₂ → AlCl₃ + Cu

Balanced equation: 2Al + 3CuCl₂ → 2AlCl₃ + 3Cu

Explanation:

⇒Step 1: Write the given unbalanced equation

Al + CuCl₂ → AlCl₃ + Cu

⇒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, let us consider chlorine atom first. If we multiply 2 in the product (in AlCl₃) and 3 in the reactant (in CuCl₂) we will get the equal number of atoms in both sides.

⇒Step 4: Write the resulting equation:

Al + 3CuCl₂ → 2AlCl₃ + Cu

⇒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 aluminum and copper atoms are unequal on the two sides.

First balance the aluminum atom.

⇒Step 6: If we multiply 2 in the reactant (in Al), we will get the equal number of atoms as in product (in 2AlCl₃)

⇒Step 7: Write the resulting equation:

2Al + 3CuCl₂ → 2AlCl₃ + Cu

⇒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 copper atoms are unequal on the two sides.

⇒Step 9: If we multiply 3 in the product (in Cu), we will get the equal number of atoms as in product (in 3CuCl₂)

⇒Step 10: Write the resulting equation:

2Al + 3CuCl₂ → 2AlCl₃ + 3Cu

⇒Step 11: Now check whether the equation is balanced or not by comparing the atoms.

We find that the equation is now balanced.

⇒Step 12: Write down the final balanced equation:

2Al + 3CuCl₂ → 2AlCl₃ + 3Cu