Red cabbage is a natural pH indicator. Watch @Joe Tasker use cabbage water to test his household items pH levels. Red cabbage contains a water soluble pigment called anthocyanin that changes colour when mixed with an acid or alkaline. The pigment will turn red with a pH less than 7 and the pigment turns blueish-green in alkaline environments with a pH greater than 7. #chemistry #learnontiktok #scienceexperiments