What is the chemical in red cabbage?

What is the chemical in red cabbage?

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.

What is universal indicator solution used for?

A universal indicator is a blend of pH indicator solutions designed to identify the pH of a solution over a wide range of values.

Is cabbage acid or alkaline?

Cruciferous vegetables such as cauliflower, broccoli, cabbage, and Brussels sprouts are alkaline in nature. They contain high amounts of vitamin A, C, K, folate, and photochemical plant compounds that help to lower inflammation and reduce the risks of cancer.

What is the pH of red cabbage?

pH ≈ 4: light purple. pH ≈ 6: violet (aka dark purple), this is approximately the color of your ‘native’ red cabbage, how you buy it. pH ≈ 8: blue.

What colour is the universal indicator?

Universal indicator

pH range Description Colour
3–6 Weak acid Orange or Yellow
7 Neutral Green
8–11 Weak alkali Blue
> 11 Strong alkali Indigo or Violet

What colour is acid in universal indicator?

Universal indicator has many different colour changes, from red for strongly acidic solutions to dark purple for strongly alkaline solutions. In the middle, neutral pH 7 is indicated by green.

Why is phenolphthalein used in titrations?

A strong acid- strong base titration is performed using a phenolphthalein indicator. Phenolphtalein is chosen because it changes color in a pH range between 8.3 – 10. It will appear pink in basic solutions and clear in acidic solutions.