freechlorine
Free chlorine refers to the active forms of chlorine that are available to disinfect water. It is typically measured in parts per million (ppm) or milligrams per liter (mg/L). The primary forms of free chlorine in water are hypochlorous acid (HOCl) and the hypochlorite ion (OCl-). The balance between these two forms is dependent on the pH of the water. At lower pH levels, hypochlorous acid, which is a more potent disinfectant, is more prevalent. As the pH increases, the proportion of hypochlorite ion increases, and its disinfection efficacy decreases.
Free chlorine is added to water sources as a disinfectant to kill harmful microorganisms such as bacteria,
Maintaining an adequate level of free chlorine residual is crucial for ensuring continuous disinfection as water