Nitrate, $\text{NO}_3^-$, ions are hard to remove from groundwater. Why is this?
State which ions in the table above are likely to be removed from the water by treatment with powdered limestone, $\text{CaCO}_3$, and give a reason for each answer.
Nitrates and phosphates may enter water courses such as rivers or streams because of human activity. Both ions are nutrients for algae. What is the source of these nitrates?
The geological character of the soil controls the chemical make-up of the groundwater. The table shows some ions that may contaminate groundwater.
Nitrates and phosphates may enter water courses such as rivers or streams because of human activity. Both ions are nutrients for algae.
Suggest a source for the phosphates found in water courses.
How do nitrates and phosphates affect water courses?
Acid rain can seriously affect natural waters, especially lakes. In recent years, there has been a worldwide effort to cut the amount of acid rain produced.
Write equations to show how acid rain is produced from sulfur dioxide, $\text{SO}_2$.
The use of fossil fuels is one major source of sulfur dioxide. Name one other major industrial source.