The pH scale ranges from:

The pH scale is a measure of how acidic or basic a solution is, and it typically ranges from 0 to 14. This scale is logarithmic, meaning that each whole number change represents a tenfold increase or decrease in acidity or alkalinity. A pH of 7 is considered neutral, with values below 7 indicating acidity and values above 7 indicating alkalinity.

Understanding this scale is crucial in various water treatment processes, as the pH can affect chemical reactions, microbial activity, and the solubility of minerals in water. Therefore, knowing the correct range of the pH scale is fundamental for professionals managing water quality.

The other options do not accurately reflect the standard pH scale. While some unusual systems may measure beyond this range, typical applications in water chemistry adhere to the 0 to 14 scale.