For the chemical composition of cabbage see the link below.
For the composition of cabbage see the link below.
anthocyanin
The color change, though physical by itself, is caused by a chemical change of some colored substances in cabbage.
...indicator. (Or, the juice of a cabbage. :) )
Alkalis turn red cabbage juice blue/green/yellow.
From a cabbage!(:
from a cabbage
Red cabbage contain a pigment from the group of anthocyanins.See the general structure of an anthocyanin at the link below.
the color of the cabbage juice mixed with the chemicals shows where the chemicals would be placed on an pH scale. the lighter the chemical is with the cabbage juice, the more acidic. the darker, the more basic.
There is no such thing as purple cabbage juice because red cabbage juice is actually already purple, its just called red cabbage jucie.
When red cabbage juice is mixed with baking soda, a chemical reaction occurs. The baking soda is a base and reacts with the anthocyanins in the red cabbage juice, causing a color change. The mixture will turn blue or blue-green due to the change in pH.
When adding tomato juice to cabbage juice, the cabbage juice turns redish