CuCl2 + Al - - - > AlCl3 + Cu

Balance the single replacement chemical reaction.

A) CuCl2 + Al - - - > AlCl3 + Cu

B) 3CuCl2 + 2Al - - - > 2AlCl3 + 3Cu

C) 2CuCl2 + 3Al - - - > 3AlCl3 + 2Cu

D) 3CuCl2 + 3Al - - - > 3AlCl3 + 3Cu

B

All the elements have the same amount of atoms.

For a balance chemical equation:

The number of atoms of a molecule should remain conserved that is total number of atom of a molecule in reactant side should equal to the number of atoms of a molecule in the product side.

Here also the number of atoms of an element should remain conserved on both sides, So the answer is option B.

That is

B) 3CuCl₂ + 2Al - - - > 2AlCl₃ + 3Cu

Here the number of atoms of Cu, Cl and Al are equal in both side, reactant as well as product.