put small pieces of purple cabbage in hot water and stir it and leave it for 20 min and take only water.
if indicator turns substance red it is acidic ,if blue then basic if no change then neutral
...indicator. (Or, the juice of a cabbage. :) )
it is an indicator.
anthocyanin
An artificial indicator is one that is chemically made and you cannot create from Natural Resources e.g. cabbage juice
It is an acid, because Red Cabbage Juice is an indicator, and White Vinegar is an acid.
it turns greenish yellow if it is added to a base
If the pH of a detergent is usyally greater then 7 the juice of red cabbage become blue to green in this solution.
yes I've done it for a science project
Alkalis turn red cabbage juice blue/green/yellow.
When sodium hydroxide is added to red cabbage juice, the cabbage juice will change color. The cabbage indicator will turn from red/pink to blue/purple because sodium hydroxide is a strong base, causing a shift in the pH of the solution. This color change is due to the anthocyanin molecules in the red cabbage juice reacting with the change in acidity.
Red cabbage juice is a natural pH indicator that changes color based on the acidity or alkalinity of the solution. In vinegar, which is acidic, the cabbage juice turns red or pink. In baking soda, which is alkaline, the cabbage juice turns blue or green. This color change is due to the interaction between the pigment molecules in the cabbage juice and the different pH levels of the solutions.
Because tooth paste is a base because anything that turns a blue or green when mixed with red cabbage juice(indicator) is a base.