Unbalanced Equation:

CuCl₂ + H₂S → CuS + 2HCl

Balancing the Equation:

1. Count the atoms on each side:

- Reactants: 1 Cu, 2 Cl, 2 H, 1 S

- Products: 1 Cu, 1 S, 2 H, 2 Cl

2. Adjust coefficients to make the number of atoms equal:

- The copper and sulfur atoms are already balanced.

- The hydrogen and chlorine atoms need to be balanced. We can do this by putting a coefficient of 2 in front of HCl on the reactant side:

CuCl₂ + H₂S → CuS + 2HCl

Balanced Equation:

CuCl₂ + H₂S → CuS + 2HCl

Explanation:

Now, both sides of the equation have:

- 1 Copper (Cu) atom

- 2 Chlorine (Cl) atoms

- 2 Hydrogen (H) atoms

- 1 Sulfur (S) atom