pH Scale and Indicators
pH ranges and common indicator color changes.
The pH scale from strongly acidic to strongly basic, with the usual category for each value and the color of universal indicator. Rows for pH 2, 3, 4, 6, 8, 10, 11, 12 and 14 fill in the scale between the original reference points.
Use it when
- You need the category and approximate indicator color for a pH value.
- You are explaining the scale to a learner.
Watch out for
- Indicator colors are approximate and depend on the specific indicator or test paper used.
- pH 7 is neutral only at 25 degrees Celsius; the neutral point shifts with temperature.
The data
14 rows
| Ph | Category | Indicator color |
|---|---|---|
| 1 | Strongly acidic | Red with universal indicator |
| 5 | Weakly acidic | Orange |
| 7 | Neutral | Green |
| 9 | Weakly basic | Blue |
| 13 | Strongly basic | Purple |
| 2 | Strongly acidic | Red |
| 3 | Acidic | Orange-red |
| 4 | Acidic | Orange |
| 6 | Weakly acidic | Yellow |
| 8 | Weakly basic | Blue-green |
| 10 | Basic | Blue |
| 11 | Basic | Blue-violet |
| 12 | Strongly basic | Violet |
| 14 | Strongly basic | Purple |
Fields
The shape of this dataset, read from the data itself: every column, its type and a real value. Agents can use this to plan a query without fetching the whole document.
| Section | Field | Type | Example |
|---|---|---|---|
| data | ph | integer | 1 |
| data | category | string | Strongly acidic |
| data | indicator_color | string | Red with universal indicator |
Fetch the same bytes
The static files contain the same reference rows as the API, with no API rate limit. Live metadata, such as view counts, may differ. Use the API for content negotiation; use the static files for a cacheable snapshot.
curl "https://yjtoon.yunusemrevurgun.com/api/dataset/ph-scale-indicators?format=toon"
const res = await fetch( "https://yjtoon.yunusemrevurgun.com/static-data/dataset/ph-scale-indicators.toon" ); const toon = await res.text();
Rate limit: 120 requests per minute per IP, no key and no signup. API reference →