3 years ago

Rainwater has a ph below 7 because raindrops absorb co2 which can react with water to form carbonic acid.

1 answer:

7 0

This statement is true. Pure water has a neutral pH of 7. However, the atmosphere is a mixture of gases, which includes carbon dioxide among others. When it interacts with carbon dioxide, this reaction occurs:

H₂O + CO₂ → H₂CO₃

The product is carbonic acid which is a weak acid. Because the pH of an acid is below 7, the rain would also have a pH below 7.

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