What is the pH of pure water?

Pure water has a pH of 7.0, which is considered neutral on the pH scale. The pH scale ranges from 0 to 14, with values below 7 indicating acidity and values above 7 indicating alkalinity. At a temperature of 25 degrees Celsius (77 degrees Fahrenheit), pure water dissociates into hydrogen ions (H⁺) and hydroxide ions (OH⁻) in equal concentrations, leading to a balance that results in a neutral pH of 7.

This characteristic of pure water is essential in various biological and chemical processes, making it a standard reference point in pH measurement. Other options provided, such as 6.5, 7.5, and 8.0, do not represent the pH of pure water, as they indicate slightly acidic and basic conditions, respectively.