Classifying acidity
Question
A water sample from a model pond has a pH of 4. Which description fits the sample?
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AAcidic✓ Correct
Its pH falls below the neutral point.
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BBasic✗ Incorrect
A basic sample lies above the neutral point.
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CNeutral✗ Incorrect
Neutral water has a pH of 7 on this scale.
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DNeither acidic nor basic✗ Incorrect
A reading below neutral identifies acidity.
Rationale
The reading lies below the neutral point on the pH scale. That places the sample in the acidic range.
RememberA pH below 7 indicates acidity.
Sources
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pH and Water
U.S. Geological Survey · License: US government work (public domain) · Retrieved · Water Science School Home Page
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