Indicator Color Changes in Acid vs Alkali
| Indicator | In Acid (Low pH) | In Alkali (High pH) |
|---|---|---|
| Phenolphthalein | Colorless | Pink |
| Methyl Orange | Red | Yellow |
| Methyl Red | Red | Yellow |
| Methyl Violet | Yellow | Violet |
| Methylene Blue | Red | Blue |
| Bromothymol Blue | Yellow | Blue |
| Bromocresol Green | Yellow | Blue-green |
| Thymol Blue | Red | Yellow (first transition), Blue (second transition at higher pH) |
| Litmus | Red | Blue |
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