What is the strength of Calcium Hypochlorite?

Calcium hypochlorite is a widely used chemical for disinfection and water treatment. When discussing its strength, it typically refers to its available chlorine content, which indicates how effective it is at killing microorganisms.

The correct choice indicates that calcium hypochlorite generally contains 65-70% available chlorine. This concentration is significant because it determines the chemical's efficacy in disinfection processes. Higher concentrations might not be as commonly used due to handling considerations and stability issues.

Other percentages listed, such as 50-55%, 75-80%, and 85-90%, do not accurately represent the standard concentration of calcium hypochlorite used in water treatment. The commonly accepted and utilized strength falls within the 65-70% range, making it effective while still being manageable in terms of storage and application. Understanding this strength is crucial for water treatment operators when calculating dosages for effective disinfection.