Chemical traffic light
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Video source record: https://commons.wikimedia.org/wiki/File:Chemical%20traffic%20light.webm
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Summary
| Description | After the solution is shaken, the color turns to green. When it is left for about 30 seconds, it turns red. After we leave it for another 10-15 seconds it turns back to yellow. The reagents are indigo carmine (C16H8N2Na2O8S2), sodium hydroxide (NaOH), water (H2O) and glucose (C6H12O6). |
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| Date | 2015-11-25 |
| Source | commons.wikimedia.org |
| Author | Junsuda.dha |
