Chemistry · Environmental Chemistry

Normal clean rainwater is slightly acidic due to dissolved carbon dioxide. However, precipitation is classified as 'acid rain' when its pH drops below approximately:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

18.2
27.0
35.6✓
43.0

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5.6

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Normal clean rainwater is slightly acidic due to dissolved carbon dioxide. However, precipitation is classified as 'acid rain' when its pH drops below approximately:

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Normal clean rainwater is slightly acidic due to dissolved carbon dioxide. However, precipitation is classified as 'acid rain' when its pH drops below approximately:

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