In order to make this kind of an indicator, you need: RED CABBAGE, A MIXER, WATER, STRAINER, ACID, BASE, BEAKER (or a glass).
Now, take a few of the red cabbage leaves and put them in the mixer, after that, put water into the mixer. Now: MIX! When you mix, strain off the cabbage-leaf parts into a beaker and you're ready to go. If you pour hydrochloric acid, the juice turns red, if you put ammonia, it turns green, if you put a solution of sodium hydroxide, it turns yellow. Of course, these are all lab-grade chemicals. You can also use (Lemon) Citric Acid, Acetic Acid(Vinegar), Sodium Bicarbonate(Baking Soda)...Hope I helped..! :)
The red-cabbage indicator smells like cabbage, nothing else...
Lemonade will turn pink when red cabbage indicator is added to it. This color change is due to the red cabbage indicator being sensitive to pH levels. The acidity of the lemonade will cause the red cabbage indicator to change color to pink.
either a green, dark green or blue colour for i have done the test myself
One substance that fits this description is red cabbage indicator. In the presence of a base, the red cabbage indicator turns blue due to a change in pH.
If you blend red cabbage with water (the best ratio for this is 1:2, one cabbage leaf for two cups of water) and then add toothpaste the mixture will turn green. This indicates that toothpaste is a base. If you add vinegar instead the solution will turn red, indicating an acid.
Red Cabbage and Beetroot can be used but what else?
No, it is natural, coming from "red cabbage".
The red-cabbage indicator smells like cabbage, nothing else...
Nothing, but red cabbage is a simple pH indicator at home (red in acidic solutions).
Lemonade will turn pink when red cabbage indicator is added to it. This color change is due to the red cabbage indicator being sensitive to pH levels. The acidity of the lemonade will cause the red cabbage indicator to change color to pink.
Red Cabbage
red cabbage is a good indicator
You can use a blender or food processor to grind up red cabbage to make an indicator solution. Make sure to strain the mixture to separate the liquid from the solids. The liquid will then be ready to use as a pH indicator.
A buffer absorbs or releases excess hydrogen ions, making the solution hold at a steady pH. Since red cabbage indicator makes a good pH indicator, it has a neutral pH. any amount of acids or bases added would change the pH of the red cabbage juices. If it made a good buffer, it would not make a good pH indicator.
Filtration
anthocyanin
It is important to release a liquid.