Use the Figure Above to Answer the Following Question

question 17

Multiple Choice

Use the figure above to answer the following question.
-A decrease of one unit in the pH scale above represents a tenfold increase in the hydrogen ion concentration of a solution. For example, a solution having a pH of 4 is 10 times more acidic than a solution with a pH of 5. If acid precipitation rain changes the pH of a pond from 7.5 to 6.5, the level of hydrogen ion has changed by a factor of ___________________

• A) 10
• B) 100
• C) 13.0
• D) 0.01
• E) 2.0

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