Purple Cabbage pH Indicator
The method of purple cabbage pH indicator
There is a miracle in the world, which can make purple cabbage as a pH indicator. Take the purple cabbage, select its leaves, wash and drain it. Cut it up with a knife, put it in a bowl, and mash it into mud. Soak it in water again, the amount of water is moderate, stir well. After a while, filter its juice with a cloth to get purple cabbage juice, which is also a pH indicator.
If you want to test its effect, prepare a test solution, acid and base are different. Dip a clean stick in the test solution, point it on a white porcelain plate, and drop purple cabbage juice on it. See its color change, when the acid meets it, the color turns red; when the lye touches it, the color turns green. Depending on the color difference, the nature of the acid and alkali of the test solution can be judged. Its method is wonderful and simple, and it is quite beneficial to the acid and alkali of the test object.
