- 1. Which is not a property of acids?
A) Acids have a pH of less then 7.
B) Acids react with metals and carbonates.
C) These are sour to taste.
D) Acids turn red litmus blue.
E) Acids turn blue litmus red.
- 2. Which is not a property of bases?
A) Bases do not change the color of red litmus.
B) These are bitter to taste.
C) Bases have a pH of more than 7.
D) Bases do not change the color of blue litmus paper.
E) Bases do not react with metals or carbonates.
- 3. Ammonia is found in many household products, such as window cleaners. It turns red litmus blue. What is it?
A) Basic
B) Neutral
C) Acidic
D) None of these options
- 4. Is distilled water acidic/basic/neutral?
A) Basic
B) Acidic
C) Neutral
- 5. Indicator is a compound which shows different colors in acidic and basic solutions.
A) True
B) False
- 6. Tooth decay is caused by the presence of a base. *Think, what does the dentist always tell you not to eat/drink because it rots your teeth*
A) False
B) True
- 7. An antacid tablet (like Tums) contains a(n)
A) Acid
B) Base
- 8. Milk of magnesia (helps constipation and was a part of your pH Gizmo lab) contains a(n)
A) Acid
B) Base
- 9. A bee sting is slightly acidic. What would be a good option to put on the bee sting to neutralize it?
A) Lemon Juice
B) None of these options
C) Vinegar
D) Baking Soda solution
- 10. A jellyfish sting is slightly basic. What would be a good option to put on the jellyfish sting to neutralize it?
A) Dish Soap
B) Vinegar
C) None of these options
D) Oven Cleaner
- 11. Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution?
A) None of these options
B) Acidic only
C) Either basic or neutral
D) Either acid or neutral
E) Basic only
- 12. Which of these statements is correct?
A) Both acids and bases change color of all indicators.
B) If an indicator changes color with a base, it does not change color with an acid.
C) None of these options
D) If an indicator gives a color change with an acid, it does not give a change with a base.
E) Change of color in an acid and a base depends on the type of the indicator.
- 13. Cola (was a part of your pH Gizmo lab) contains a(n)
A) Base
B) Acid
- 14. What is the pH level of ocean water? (Was a part of your pH Gizmo lab)
A) 7
B) 6
C) 8
D) 5
E) 9
- 15. What is the pH level of tomato juice? (Was a part of your pH Gizmo lab)
A) 7
B) 4
C) 9
D) 11
E) 2
- 16. Place these unknown pH test papers in order from most acidic to most basic: (Your pH Gizmo lab may help)
A) B, A, C, D
B) C, D, A, B
C) D, C, A, B
D) D, C, B, A
- 17. A new mild dish detergent is being tested before putting it on the market. If the new detergent were tested with 0-14 pH test paper, the test strip would most likely turn what color? (Your pH Gizmo lab may help)
A) 5.6
B) 13.2
C) 8.2
D) 2.3
- 18. Chemicals in the air can combine with rain to produce acid rain, which is harmful to the environment. Which of these is most likely to be the pH of acid rain? (Your pH Gizmo lab may help)
A) 0
B) 14
C) 10
D) 4
- 19. Based on the materials measured in the pH Gizmo, what is the most likely pH of apple juice?
A) 3.9
B) 8.4
C) 11.7
D) 0.3
- 20. Suppose you have already compared the pH values of two substances using 0-14 paper. When would a follow-up test using 4.5-7.5 paper be most helpful? (Your pH Gizmo lab may help)
A) when one substance had a pH value of about 5 and the other substance had a pH value of about 7 on the 0-14 paper
B) when both substances had a pH value of about 6 on the 0-14 paper
C) when both substances had a pH value of about 9 on the 0-14 paper
D) when both substances had a pH value of about 3 on the 0-14 paper
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