Red cabbage (Brassica oleracea capitata rubra) can be used as a natural pH indicator, its pigments change color in response to varying pH levels.Pigments can be extracted from the leaves of red cabbage, and relative pH can be determined by adding drops of a liquid into the pigment, as noted in the following table:pH 1-2 Pink/AcidpH 3-4 Dark Red/AcidpH 5-6 Violet/AcidpH 7-8 Blue/Neutral-BasepH 9-10 Blue-Green/BasepH 11-12 Green-Yellow/BaseWhat can a student determine about the red cabbage solution as a natural indicator of pH?

Question

Quizplus · Accepted Answer

It turns pink in the presence of acids.
Key Takeaway: The table indicates that red cabbage solution changes colors based on the pH of substances added to it. Adding acids results in a change of color from blue to violet to red and eventually pink whereas adding bases results in a color change from blue to blue-green to greenish-yellow.
Photo: Red cabbage, by Rick Heath

Red Cabbage (Brassica Oleracea Capitata Rubra) Can Be Used as a Natural