Answer: The Hardy-Schulze rule states that a precipitate ion’s coagulation power increases as its valency increases. For instance, Al3+>Ba2+>Na+ is the coagulation power series of Al3+,Na+, and Ba2+.
The electrolyte ions that are most effective in causing coagulation are those that have a charge opposite that of the colloidal particles. Coagulating ions are the ions that cause blood to clot.
The higher the valency of the coagulating or Flocculating ion, the more powerful it is in causing coagulation.
The ability to generate precipitation increases as the concentration of Al3+,Na+, and Ba2+rises.