1 solution has 3 colors ("Chemical Traffic Light" experiment)

[@elizabethcopeland2979]

What were the exact concentrations and volumes used in the video? Assuming that is a 1L beaker, that's way more than 240mL (200mL glucose, 40mL 1M NaOH) you are adding. I'm trying to repeat and my reactions always skip the blue colour, and go straight to green. How much water did you dilute your indigo carmine in? Assuming a rough1:1 ratio from the video and the recipe in the comments, adding 1g indigo carmine in 200mL, plus your glucose/NaOH solution, and trying this in the lab with distilled water, the blue reaction step is not repeatable.

[@minty737]

They have listed amounts on their site :) Hope it helps. melscience.com/NO-en/articles/chemical-traffic-light-experiment/

[@smythe6147]

do you have a recipe to make the solutions please?

[@eunaekim9216]

I thought traffic lights went from green to yellow to red!

[@feliska4774]

Do you guys know where the place to buy indigo carmine in Indonesia ?

[@MELScience1]

We wish we did, but no

[@cynthiarod3]

Is there an exact author for this project? I need it for my reference

[@MELScience1]

You may refer to MEL Science 👨‍🔬👩‍🔬

[@marnomozzarelli4814]

So cool

[@xyzgamingplus7119]

How I buy thise comical

[@habibalaziz6638]

wow

[@manchu563]

dont works

[@MELScience1]

sometimes you need to play with the quantities of the reagents