Can anyone tell me some cool experiments that we can do with red cabbage pH indicator?
If you are staying within the household you could use the red cabbage indicator to test various things around the house. This indicator belongs to a class of vegetable dye called Flavins. provided you start with the indicator in a water solution at neutral, then the following colours will be observed when you put it into solutions of various acidity or pH. ph 2, Red: pH 4 Purple: ph 6 Violet: pH 8 Blue: pH 10 Blue green; pH 12 Green yellow. You could try tap water, pop, bleach (but be quick the colour can fade), soap solution, liquid cleaners, saliva, urine, and much much more.Get a pH range for each. You could also titrate acids like vinegar with alkalis like ammonia solution and onserve the colour changes. If you put all of these things in the fridge for a while first, they will certainly be cool.
