What pH Measures
What pH Measures
The pH scale measures how acidic or alkaline a solution is. A solution with pH 777 is neutral, a pH below 777 is acidic, and a pH above 777 is alkaline.
Step-by-step lessons on Edexcel GCSE Chemistry 4.1.2 Hydrogen ion concentration and pH. Each one builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.