3.2 - Understanding the pH scale
Use the pH scale to classify solutions as acidic, neutral or alkaline, including values close to neutral.
Reading the pH scale
pH is a number that describes how acidic or alkaline an aqueous solution is. The usual school scale runs from 0 to 14. At room temperature, use pH 7 as the neutral point; pure water is an example.
| pH value | Classification |
|---|---|
| Below 7 | Acidic |
| 7 | Neutral |
| Above 7 | Alkaline |
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