Name_________________________ Date _________________________ Block ______Biology(H)-Kimmerle
pH Scale
Match the words/phrases to the correct blanks.
Higher
Greater Than
Lower
Equal To
Less Than
1-5) Acids have a pH ​___________________​7 and a ​___________________
concentration of hydrogen (H+) ions than bases do. Bases have a pH
___________________​ 7 and have a ​___________________​ concentration of hydrogen
(H+) ions than acids do. Neutral substances have a pH ​___________________​ 7.
6. Do acids have more H+ ions or OH- ? ___________________________
7. What is the purpose of a buffer?
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8-12) Label the following substances as Acids or Base depending on the pH?
Vinegar pH of 2.5
Oven cleaner pH of 13
Sea Water pH of 8
Saliva pH of 6
Tomato Juice pH of 4
13-15) For the next 3 questions tell me how much stronger each of the following acid or
base is than pure water (pH of 7). Remember each step is 10 times stronger than the
previous.
Black Coffee pH of 5 _______________________
Ammonia Solution pH of 11 _______________________
Lemon Juice pH of 2 ______________________