How do you use red cabbage juice as an indicator?

How do you use red cabbage juice as an indicator?


  1. Chop the cabbage into small pieces until you have about 2 cups of chopped cabbage.
  2. Filter out the plant material to obtain a red-purple-bluish colored liquid.
  3. Pour about 50–100 mL of your red cabbage indicator into each 250 mL beaker.
  4. Add various household solutions to your indicator until it changes color.

What is the name of the natural indicator found in red cabbage?

For example, red cabbages contain an indicator pigment molecule called flavin, which is a type of molecule called an anthocyanin. Very acidic solutions will turn an anthocyanin red whereas neutral solutions will make it purplish and basic solutions will turn it greenish-yellow.

Is red cabbage juice a natural indicator?

Red cabbage juice contains a natural pH indicator that changes colors depending on the acidity of the solution. The pigment in red cabbage that causes the red color change is called flavin (an anthocyanin).

Is red cabbage a good pH indicator?

Discussion: Red cabbage is useful as a pH indicator because the leaves contain a pigment molecule from the family of anthocyanins (shown below) which are responsible for many of the red/purple/blue colors observed in fruits and vegetables. As the solution becomes more acidic a red color results.

Is red cabbage acidic or alkaline?

Red cabbage juice is an acid-base indicator; it will change colors when various chemicals are poured into it. Acids, such as vinegar, cola and apple juice, will turn the juice a reddish color. Bases, like ammonia and baking soda, will turn the juice a greenish color.

How do you test pH with red cabbage?

Chop up several red cabbage leaves. Place the leaves in a blender and add 200 mL water. Blend the mixture and then pour it through the strainer into the large beaker or container. The red cabbage juice indicator is now ready for use.

Why is red cabbage a good pH indicator?

What is the pH level of cabbage?

Cabbage has a pH level ranging between 5.50-6.75. This makes it one of the least acidic vegetables and safe to consume on a low-acid diet.

What pH is cabbage?

Figure 6.

pH Color
6 Violet
8 Blue
10 Blue-green
12 Greenish-yellow

Is red cabbage alkaline or acidic?

red cabbage is alkaline. Red cabbage has a 9.0 pH level once digested. Most fresh vegetables are alkaline foods.

What are the limitations for using red cabbage as a pH indicator?

Ans: Red cabbage is a good indicator, but it has its disadvantages which are as follows: It is slower than litmus paper, it contaminates the solution, it does not tell about the acidic or basic strength, it requires more solutions than litmus paper, and if the solution is dark, the colour change is not visible.

What are natural pH indicators?

Beets, blackberries, grape juice, plums, turnip skin, and more all act as an edible natural pH indicator. They all have anthocyanin in them which makes the solution change color, but they also differ in that little side groups attached to the main molecule cause the color changes to vary between foods.

Why you can use red cabbage as pH indicator?

Two leaves of red (purple) cabbage A head of red cabbage can be purchased at most grocery stores.

  • One or more coffee filters A package of these can also be purchased at most grocery stores.
  • Medium-sized pan This should be big enough so that the cabbage leaves will lie on the bottom (although they do not have to lie completely flat).
  • Why is red cabbage a good indicator?

    Red cabbage juice is considered to be an indicator because it shows us something about the chemical composition of other substances.Red cabbage contains a water-soluble pigment called anthocyanin that changes color when it is mixed with an acid or a base.

    How to test pH with red cabbage?

    Some red cabbage

  • Boiling water
  • Different things to test (it works best if its a clear or fairly clear liquid,or anything that will dissolve in water). We used
  • Why can red cabbage be used an indicator?

    Red cabbage gets its colour from compounds called anthocyanins in its leaves. These anthocyanins are peculiar in that they’re pH-sensitive, and this allows them to be used as pH indicators. If they are extracted from the red cabbage leaves by boiling the cabbage in water, the resulting solution can be added to different substances to test them.