PacSci Perspectives


PacSci DIY: Ocean Acidification In A Cup

by | Feb 27, 2018

PacSci DIY: Ocean Acidification

Create your own example of carbon-dioxide rich atmosphere in a cup and watch the reaction of the water beneath it. Does the water change color? Does it bubble? Does it stay still? This PacSci DIY demonstrates how the ocean atmosphere interacts with carbon dioxide gas and how it diffuses into water, causing the water to become more acidic.

Materials you will need for Ocean Acidification in a Cup:

  • An acid-based indicator diluted with water, we recommend red cabbage juice (directions on how to make below)
  • Two clear 10-ounce plastic cups
  • One 3-ounce paper cup
  • Masking tape
  • White paper
  • Baking soda
  • Vinegar
  • Seran wrap
  • Permanent marker
  • How to make red cabbage juice:
  • Ingredients:
  • One small red cabbage
  • 6.75 fluid ounces of water
  • Blender
  • Strainer
  • Large clear container

Cut the red cabbage in half. Chop the leaves into smaller pieces in order to blend thoroughly. Once the cabbage leaves have been cut up into smaller pieces, place in blender and add the 6.75 fl.oz of water. Blend the mixture into liquid, then pour through the strainer into the large clear container.

Note: If using distilled water, the indicator will have a reddish purple color to it. If you use tap water, the indicator will have a violet blue color.