Chemistry · Acids, Bases and Salts
The pH of fresh groundwater slightly decreases upon exposure to air because:
- 1the dissolved oxygen of the groundwater escapes into air
- 2the dissolved carbon dioxide of the groundwater escapes into air
- 3oxygen from air is dissolved in the water
- 4carbon dioxide from air is dissolved in the water✓
Correct answer
carbon dioxide from air is dissolved in the water
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