CuCl₂ + K₂S = CuS↓ + 2KCl
Cu₂⁺ +2Cl⁻ + 2K⁺ + S²⁻ = CuS↓ + 2K⁺ + 2Cl⁻
Cu₂⁺ + S²⁻ = CuS↓
Cu(NO₃)₂ + Na₂S = CuS↓ + 2NaNO₃
Cu₂⁺ +2NO₃⁻ + 2Na⁺ + S²⁻ = CuS↓ + 2Na⁺ + 2NO₃⁻
CuCl₂ + K₂S = CuS↓ + 2KCl
Cu₂⁺ +2Cl⁻ + 2K⁺ + S²⁻ = CuS↓ + 2K⁺ + 2Cl⁻
Cu₂⁺ + S²⁻ = CuS↓
Cu(NO₃)₂ + Na₂S = CuS↓ + 2NaNO₃
Cu₂⁺ +2NO₃⁻ + 2Na⁺ + S²⁻ = CuS↓ + 2Na⁺ + 2NO₃⁻
Cu₂⁺ + S²⁻ = CuS↓