why is an alkaline substance dropped into lakes in some countries?
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Answer:
Under natural conditions, rainwater, which is slightly acidic, runs through the soils near a lake. These soils often contain limestone or calcium, which is alkaline and neutralizes the acid. ... Eventually however, these substances are used up and the water that runs into lakes and rivers is extremely acidic.
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Answer:
Sulphuric dioxide produced by industries and released into the atmosphere returns as acid rain or sulphuric acid. In lakes impacted by acid rain, such as in Ontario, Canada, the application of alkalis dropped by airplanes can control and neutralize the water's pH level.
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