One of the options to determine whether a solution is acidic or basic (alkaline) is to make a pH indicator from red cabbage.
How does it work?
Red cabbage contains a water-soluble pigment called “anthocyanin”. The pigment changes when it is mixed with acidic solutions (pH less than 7) or with basic solutions (pH greater than 7). In neutral solutions (pH equal to 7) the color will stay the same. We can determine the changes according to the colors of “Red cabbage pH indicator colors”.
Red cabbage pH indicator colors:
Tom wanted to identify the acidic substances in his kitchen among the following: milk, lemon juice, water and baking soda. Tom tested the substances with red cabbage juice. What he found out about the four solutions?
I challenge you to check another substances in your kitchen!