Red Cabbage Juice Indicator
Red Kale Juice Indicator
Those who were good at studying physical properties in ancient times tasted red kale, and took its juice as a test agent. At the beginning, pick fresh red kale, clean it, crush it and cook it in a kettle, the fire is moderate, wait for its color to melt in water, take juice for later use.
and test various things, put all liquids in a cup, drop red kale juice in it. In case of acid liquid, the color of the juice will turn red, bright like Dan; in the case of alkali liquid, its color will turn blue, deep like an abyss. And the degree of acid and alkali is different, and the color will also gradually change, such as light red, dark red, light blue, dark blue, all can be distinguished.
The wonder of this agent is that it can change the color intuitively and show the acid and alkali of the object, which is of great help in various experiments and identification of physical properties. Although there is no complicated tool, only the common red cabbage juice can obtain this magical indicator, which is really one of the paths to explore physical properties.
