PH scale

Summary: The pH scale is a measure of how acidic or alkaline a solution is. On the pH scale: - an acid has a pH of less than 7 – the lower the pH, the more acidic the solution - an alkaline solution has a pH of more than 7 – the higher the pH, the more alkaline the solution. Tags: science student-book-7 chemistry Created: 2026-05-21 Last Updated: 2026-05-21

PH scale

The pH scale is a measure of how acidic or alkaline a solution is. On the pH scale: - an acid has a pH of less than 7 – the lower the pH, the more acidic the solution - an alkaline solution has a pH of more than 7 – the higher the pH, the more alkaline the solution.

Source

This concept is from the [Science Student Book 7](Science Student Book 7/Chemistry/Acids and Alkalis/4.2 Indicators and pH.md), Chemistry section.