it doesnt
If you add the boiled blue water to vinegar it does turn red add it to water mixed with baking soda it turns green. I did it just cut the cabbage into small pices before boiling.
It is showing you if it is acid or akalis
I am not sure to be honest
If baking soda reacts with vinegar, it is a chemical change.
no
it will be purple
The color change, though physical by itself, is caused by a chemical change of some colored substances in cabbage.
It is a chemical change
Mix it with vinegar
It is a chemical change
Yes.
The vinegar-baking soda reaction is a chemical change.
irreversible change
because it is change in composition.
Yes, it is.