Blue Bottle Reaction (aka Signal Light Reaction)

[luckyrockeragmyt]

what is the procedure?

[Ckiller69]

co0l what indicat0r was that?

[michaelfreudiger]

scroll down to my first comment

[saltcar8]

are there any uses for this other the being cool and can u drink this cus it would be cool to drink it and wile u drink it it changes color that would be cool

[michaelfreudiger]

i dont know if the KOH is safe to drink, but everything else is. also, i should add that it took some experimentation to get the right ratio of indicators, so that one does not overpower the other one at certain pH's.

[Nerusai]

As can be noted from the OH part, this is a strong base, drinking it could be the death of you.

You shouldn't even handle it outside of a special vented laboratory chamber (acid cabinet we call it here, not sure what the proper English term is).

[wodnerduck]

right on

its called fume hood by the way

[eatbutnotpuke]

it's a very cool experiment.

but DON'T ever drink a solution that contains KOH! It would cause serious damage to your body, cause it's caustic!

[michaelfreudiger]

youtube wouldnt let me put this in the description for some reason, so i will just put it here: this is what I used:

8 grams KOH

10 grams dextrose

15 drops indigo carmine

8 drops methylene blue

all into 500 ml H2O

After shaking, colors go from blue -> green -> yellow -> red.