If you add the valences of each atom in the molecular formula for arsenious acid, H 3 AsO 3, you can see that the molecule, which is uncharged, has a total valence state of 0 (3x(+1) for the hydrogen atoms; 1x(+3) for the arsenic(III) atom; 3x(-2) for the oxygen atoms = 3+3-6 = 0).
Eighty percent of sewage in India is untreated and flows directly into the nation's rivers, polluting the main sources of drinking water, a study by an environment watchdog showed Tuesday.
These pollutants flow directly into our streams and rivers untreated, where they. contaminate our our water sources and negatively impact aquatic life. Blame for water pollution has often been directed toward âpointâ sources, such as. industry, but these sources can be easily identified and corrected. The major threat to the quality of our streams and rivers today is from the difficult to identify ânonpointâ sources