Aluminum Sulfate Ph

Aluminum sulfate, also known as alum, is a white crystalline powder that is commonly used as a coagulant in water treatment to clarify and purify drinking water. Its chemical formula is Al2(SO4)3, indicating that it contains two aluminum atoms, three sulfate ions, and 24 oxygen atoms.

The pH of aluminum sulfate solutions varies depending on the concentration of the solution and its intended use. In general, the pH of an aqueous solution of aluminum sulfate will be acidic, with a pH range of 2.5-4.5. This is because aluminum sulfate is an acidic salt that hydrolyzes in water, releasing hydrogen ions (H+) and producing an acidic solution.

When added to water for treatment purposes, such as clarifying impurities, aluminum sulfate reacts with the alkalinity of the water and forms a gelatinous precipitate called floc. This floc settles to the bottom of the water tank or basin and carries suspended particles and impurities with it, resulting in clearer water.

It should be noted that excessive amounts of aluminum sulfate can result in pH levels below regulatory requirements for drinking water quality standards. Additionally, elevated levels of aluminum in drinking water have been linked to health issues, such as Alzheimer's disease, kidney damage, and bone disorders. Therefore, proper dosing and monitoring of aluminum sulfate levels are important to ensure safe and effective water treatment.