Detection of acids and bases using red cabbage juice
Interactive
Matching exercise:
What substance can be added to change the color of red cabbage juice? What color does it turn, and what pH range does this color indicate?
Type of media:
Interactive (562.0 kByte)
Last update:
2021-06-25
License:
This medium is made available under a CC BY-SA 4.0 international license.
What does this mean?
How to reference this medium
This medium is made available under a CC BY-SA 4.0 international license.
What does this mean?
How to reference this medium
Media package:
Description:
Five everyday products are to be classified with respect to their properties as acidic (a), basic (b), or neutral (n). For this exercise, photos of the products as well as the associated indicator solutions (red cabbage juice) are to be matched to the corresponding position of the pH range.
The photos that have been matched can be dragged back or moved among the placeholders. The solution can be shown at any time during the exercise. The current status is preserved, which allows the exercise to be continued when the solution is hidden again. The matches can be evaluated by clicking the respective “Check” button. Any incorrect matches will be reset and can be matched again.
Information and ideas:
The students can test additional everyday products for their pH value using red cabbage juice as an indicator. For example, what makes red cabbage juice turn yellow, and what pH value does this color indicate?
The photos that have been matched can be dragged back or moved among the placeholders. The solution can be shown at any time during the exercise. The current status is preserved, which allows the exercise to be continued when the solution is hidden again. The matches can be evaluated by clicking the respective “Check” button. Any incorrect matches will be reset and can be matched again.
Information and ideas:
The students can test additional everyday products for their pH value using red cabbage juice as an indicator. For example, what makes red cabbage juice turn yellow, and what pH value does this color indicate?
Related media:
There are no other media directly related to this file.
Learning resource type:
Excercise
Subjects:
Biology; Chemistry
Grade levels:
Grade 7 to 9; Grade 10 to 13
School types:
Middle/high school
Keywords:
Acids; Base (chemistry); Stomach
Bibliography:
Siemens Stiftung Media Portal
Author:
MediaHouse GmbH using material from: Siemens Stiftung
Rights holder:
© Siemens Stiftung 2021