What is the lowest pH value on the scale?

The lowest pH value on the pH scale is 0. The pH scale measures the acidity or alkalinity of a solution, ranging from 0 to 14. A pH of 0 indicates a highly acidic solution, meaning that it has a high concentration of hydrogen ions. This level of acidity can be found in strong acids, such as hydrochloric acid.

In context, as the pH scale increases from 0 to 7, solutions become less acidic and eventually reach neutrality at a pH of 7, which is typically represented by pure water. Beyond 7, the scale continues to increase to a maximum of 14, indicating increasingly alkaline or basic solutions. Therefore, while values like 1, 4.7, and 7 indicate varying degrees of acidity and neutrality, none can surpass 0 on the pH scale.