Question

Write the method to prepare red cabbage indicator

Answer 1

 First, add an acidic solution such as vinegar or lemon juice until a reddish color is obtained. Then add baking soda or antacids to return the pH towards a neutral 7. You can make your own pH paper strips using red cabbage indicator

Answer 2

Cut the red cabbage into small pieces or slices. Cover 2-3 cups with water and place in a saucepan.

Heat the solution till it boils and then turn off the heat. Allow the solution to get cooled down. For that wait for about 30 minutes.

Take a jar or a large measuring cup and pour the cabbage water through a strainer into it. The purple liquid (dark) in the jar is the indicator you are looking for.

You can make ice cubes of the red cabbage indicator by simply pouring the cabbage indicator liquid into the compartments of an ice cube tray and keeping it for couple of hours so that it gets freezed.