Science Project:

Does Temperature or Concentration Affect pH?

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Materials:

  • Pure lemon juice
  • Milk
  • Microwave oven
  • Refrigerator
  • Containers or beakers (About 12)
  • Water
  • Measuring cup
  • Stirring stick
  • pH paper
  • thermometer
  • Anti-heat gloves

Procedure

  1. Pour equal amounts of lemon juice into each beaker (about ½ full). Do the same for the milk.
  2. Take the pH color and numerical value. As well as the room temperature.
  3. Take one of the beakers that is filled with lemon juice and add water until the beaker is ¾ full. Stir.
  4. Take another beaker that is filled with lemon juice and add water until the beaker is full. Stir.
  5. Take the pH color and numerical value of both. Note any changes!
  6. Repeat the above steps for the milk.
  7. With gloves, carefully take the beaker out and dip a piece of pH paper inside and take the pH. Also take the temperature.
  8. Take another beaker of pure lemon juice and put it in the refrigerator for 2 hours.
  9. Dip a piece of pH paper inside and take the pH as well as the temperature.
  10. Repeat the above steps for the milk and note any changes.

References:

Author: Sofia PC
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