A Measure of Acidity Science Fair Project

acidity science fair project abstract

Find out the difference between pH of fruits and vegetables in this 5th grade acidity science fair project.

10 years old
United States of America

Purpose of Project/Experiment

What is the difference between the pH of fruits & vegetables?


I think vegetables have more acidity, so there will be more pH in vegetables.

Materials used

  1. 1 red cabbage
  2. Large coffee filters
  3. Grapes
  4. Blackberries
  5. Beets
  6. Onions
  7. ½ cup vanilla extract per cup
  8. 1 tbs. baking soda mixed with distilled water per cup
  9. 1 cup distilled water per cup
  10. 12 clear plastic cups
  11. 1 measuring cup set
  12. 1 microwave safe plate
  13. 1 microwave


  1. Chop the cabbage and microwave on high power for 3-5 mins.
  2. Press a coffee filter into cabbage. Allow to dry.
  3. Cut the filter into small strips. These strips will serve as pH paper.
  4. In 4 cups, pour vanilla extract. In another 4, pour baking soda into distilled water and mix. Repeat with distilled water.
  5. Place beets in 1 cup of solution. Repeat with other solutions and grapes, not to mention the vegetables.
  6. Record your results.
  7. Take note: Keep the tray in sunshine for 3 hrs. a day.

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Experimental Data and Results

In every part of my acidity science fair project experiment, the fruits, vegetables, and the solutions, remain the same. In order to isolate different conditions and keep optimum care, the fruits and vegetables are changed, the solutions are different as well. The sunshine can be changed.

Look at the chemistry science fair project ideas and kits.

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