How can you use toothpaste to show that red cabbage is an indicator?

Answer 1

If you blend red cabbage with water (the best ratio for this is 1:2, one cabbage leaf for two cups of water) and then add toothpaste the mixture will turn green. This indicates that toothpaste is a base. If you add vinegar instead the solution will turn red, indicating an acid.

Answer 2

The related link gives details. Basically what you do is to finely chop red cabbage to get 2 cups of chopped cabbage. Add boiling water to cover, wait 10 minutes and filter the liquid with filter paper, such as used for coffee. You will get a reddish-purple liquid which will turn red in acids and greenish-yellow in a base. Neutral is purple. The link names some household items that you may want to test.

Answer 3

To use toothpaste to show that red cabbage is an indicator, mix a small amount of red cabbage indicator with water in a cup. Add a small amount of toothpaste to the cup and observe any changes in color. The toothpaste may cause a color change in the red cabbage indicator, indicating its acidity or alkalinity.

Answer 4

Red cabbage, can be used as an indicator, because it is clasified as a chemical substance. Red cabbage is a coloured indicator that can change colour when a household substance is added.

Answer 5

add toothpaste to red cabbage juice and see if it changes colour