2012 · Q24
The pH of fresh groundwater slightly decreases upon exposure to air because
General KnowledgeChemistry
- Acarbon dioxide from air is dissolved in the water
- Boxygen from air is dissolved in the water
- Cthe dissolved carbon dioxide of the groundwater escapes into air
- Dthe dissolved oxygen of the groundwater escapes into air
Explanation
Atmospheric CO2 dissolves forming weak carbonic acid, lowering pH.