1SDS # 1 - 9 # 18 - 22
1. (Drawing)
2. Evaporation, followed by condensation, removes nearly all dissolved substances. Then bacterial action converts dissolved organic contaminants into a few simple compounds. Lastly, filtration through sand and gravel removes nearly all suspended matter.
3. The stickiness of the substance relates to floculation because just like in floculation, it sticks together with the particles so they are easily removed.
4. It brings the pH to a good level, neutralizing the acid in water.
5. 1ppm fluoride is added to stop tooth decay.
6. The advantages are that chlorinated water is clean and the chlorine is put in to kill any bacteria or impurities.
7. Yes, it can be harmful to human health because of the high concentrations in creates.
8. The chlorine kills anything harmful like bacteria which are bad for human health.
9. Filter through UV lighting and charcoal filtration.
#18 - 22
18. The process would stop everything, causing us to have a drop in our water supply.
19. There would be no gaseous water because the evaporation wouldnt occur.
20. The chlorine would be useful because it is harder to test for smaller amounts.
21. Sand filtration, screening step.
22.
a. 2 ppm
b. 14 ppm
c. 730 ppm
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