Question: The pH scale measures how acidic or basic a substance is. pH is defined as the negative logarithm of the hydrogen ion activity in an

The pH scale measures how acidic or basic a substance is. pH is defined as the negative logarithm of the hydrogen ion activity in an aqueous solution, a_H. Thus, if a_H = 0.01, then pH = -log 0.01 = 2. Determine the pH of a liquid with a_H = 0.00407. Round your answer to the nearest hundredth.

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