Testing the pH

pH of Household Items

Substances to Test

  • Egg yolk

  • Detergent

  • Grapefruit Juice

  • Lime juice

  • Egg white

  • Listerine

  • Lemon juice

  • Toilet bowl cleaner

  • Windex

  • Vanilla

  • Toothpaste

  • Grape Juice

Equipment Used

  • Containers

  • Measuring Cup(80 mL)

  • pH Paper

  • Camera

  • Pliers

Procedures

  1. Get out your 12 objects to test the pH and the rest of the materials.

  2. Pour 20 mL of your first liquid substance into the 80 mL measuring cup and dump that substance into a container.

  3. Clean out 80 mL measuring cup with water.

  4. Pour 20 mL of your second liquid substance into the 80 mL measuring cup and dump that substance into a container.

  5. Repeat step 3.

  6. Pour 20 mL of your third liquid substance into the 80 mL measuring cup and dump that substance into a container.

  7. Repeat step 3.

  8. Pour 20 mL of your fourth liquid substance into the 80 mL measuring cup and dump that substance into a container.

  9. Repeat step 3.

  10. Pour 20 mL of your fifth liquid substance into the 80 mL measuring cup and dump that substance into a container.

  11. Repeat step 3.

  12. Pour 20 mL of your sixth liquid substance into the 80 mL measuring cup and dump that substance into a container.

  13. Repeat step 3.

  14. Pour 20 mL of your seventh liquid substance into the 80 mL measuring cup and dump that substance into a container.

  15. Repeat step 3.

  16. Pour 20 mL of your eighth liquid substance into the 80 mL measuring cup and dump that substance into a container.

  17. Repeat step 3.

  18. Pour 20 mL of your ninth liquid substance into the 80 mL measuring cup and dump that substance into a container.

  19. Repeat step 3.

  20. Pour 20 mL of your tenth liquid substance into the 80 mL measuring cup and dump that substance into a container.

  21. Repeat step 3.

  22. Pour 20 mL of your eleventh liquid substance into the 80 mL measuring cup and dump that substance into a container.

  23. Repeat step 3.

  24. Pour 20 mL of your twelfth liquid substance into the 80 mL measuring cup and dump that substance into a container.

  25. Grab a pH strip with pliers and dip it into a liquid and examine the change of color and record these results on a sheet of paper.

  26. Hold the pH strip next to the corresponding color on pH scale and take a picture.

  27. Repeat steps 25-26 until you do all of the substances.


Definitions

  • An acidic solution is any aqueous solution which has a pH < 7.0 ([H+] > 1.0 x 10-7 M).
  • A basic solution is any aqueous solution containing more OH- ions than H+ ions. An aqueous solution with a pH greater than 7.
  • An aqueous solution with a pH of 7.0 ([H+] = 1.0 x 10-7 M).




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