The pH scale runs from ___ to ___?

The pH scale, which measures the acidity or alkalinity of a solution, ranges from 0 to 14. A pH of 0 indicates a highly acidic solution, while a pH of 14 represents a highly alkaline (or basic) solution. A pH of 7 is considered neutral, meaning the solution is neither acidic nor basic.

This 0 to 14 scale is a standard for measuring pH and applies universally in chemistry, environmental science, and related fields, making it critical for understanding water quality and chemical interactions in various contexts. It reflects the concentration of hydrogen ions in the solution; as the focus is on a wide range of substances, understanding this scale is essential for evaluating conditions in water bodies, which can impact aquatic life and ecosystem health.

The other options do not accurately represent the full range of the pH scale and therefore do not correctly convey the standard measurement used in scientific contexts.