Answer to Question #349078 in General Chemistry for rim

Question

Suppose you have two containers, one containing a dilute acid and the

other a dilute base, but there are no labels on them. Describe how you

could use red cabbage to determine which solution is which.

Answer 1

Red cabbage contains a water-soluble pigment called anthocyanin that changes color when it is mixed with an acid or a base. The pigment turns red in acidic environments with a pH less than 7 and the pigment turns bluish-green in alkaline (basic), environments with a pH greater than 7.