Yes, adding dish soap to cabbage juice causes a chemical change. Cabbage juice contains anthocyanins, which are natural pH indicators that change color based on acidity or alkalinity. When dish soap is added, it alters the pH of the solution, resulting in a color change that indicates a new chemical environment. This transformation is not just a physical change but involves a chemical reaction due to the interaction of the soap with the compounds in the cabbage juice.
green
The color change, though physical by itself, is caused by a chemical change of some colored substances in cabbage.
When adding tomato juice to cabbage juice, the cabbage juice turns redish
For the chemical composition of cabbage see the link below.
reversable
For the composition of cabbage see the link below.
Because tooth paste is a base because anything that turns a blue or green when mixed with red cabbage juice(indicator) is a base.
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.
Chemical, physical is generealy changes between the states of matter, although those are not the only physical changes
Reversible
Alkalis turn red cabbage juice blue/green/yellow.
Well, honey, when you mix lemon juice with limestone, you're causing a chemical reaction that breaks down the calcium carbonate in the limestone. This reaction forms calcium citrate, carbon dioxide, and water, which is definitely a chemical change. So, yes, adding lemon juice to limestone is a chemical change, no ifs, ands, or buts about it.