Option A is true, as a tenfold difference in hydrogen ion concentration separates each whole number on the pH scale. Option B is false, as the lower the whole number on the pH scale, the greater the hydrogen ion concentration (not H + concentration). Option C is true, as pH values above 7 are basic (alkaline). Therefore, the best choice is D, as all options A, B, and C are true.

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On the PH Scale

Question 59

Multiple Choice

On the pH scale

A) a tenfold difference in hydrogen ion concentration separates each whole number.
B) the lower the whole number on the scale, the greater the H⁺ concentration.
C) pH values above 7 are basic (alkaline) .
D) all of the above.

Correct Answer: