University of Virginia
Physics Department

Where Does My pH Rank?

A Physical Science Activity

Student Activity

Materials (per group)

 

Procedure

  1. Find the pH for each substance using Hydrion paper and the pH meter as needed and record that value under the picture of that substance.
  2. Color, cut out the picture and glue it on the pH scale sheet in the correct location.

 

 

Assessment

  1. Is vinegar an acid or base?
    1. Acid
    2. Base
    3. Neutral
  2. Which is a stronger acid than apple juice?
    1. Ammonia
    2. Egg White
    3. Banana Pulp
    4. Lemon Juice
  3. Which pH is that of a strong acid?
    1. 2
    2. 5
    3. 8
    4. 12
  4. Which pH is that of a strong base?
    1. 2
    2. 5
    3. 8
    4. 12
  5. Which of the following food substances is basic?
    1. Lemon Juice
    2. Apple Juice
    3. Banana Pulp
    4. Egg White
  6. Which substance is neutral?
    1. Shampoo
    2. Tap Water
    3. Egg White
    4. Ocean Water
  7. What is the strongest acid?
    1. Lemon Juice
    2. NaOH
    3. Tap Water
    4. Ammonia
  8. What is the approximate pH of soap?
    1. 3
    2. 5.52
    3. 9
    4. 13.5
  9. Which of the following has a pH between apple juice and seven? (Which substance is slightly weaker than apple juice?)
    1. Vinegar
    2. Banana Pulp
    3. Soap
    4. Lemon Juice
  10. Which has the weakest pH value? (The pH which is most near seven?)
    1. Lemon Juice
    2. NaOH
    3. Ocean Water
    4. Ammonia