1. What 3 states of matter can water be found in? 2. What is acid rain? 3. What
ID: 234160 • Letter: 1
Question
1. What 3 states of matter can water be found in?
2. What is acid rain?
3. What is the pH of normal rainfall?
4. What is the pH of acid rain?
5. Name 4 qualities of water that make it important to life on Earth.
6. What effect does CO2 have on rain?
7. How many people around the World lack safe drinking water?
8. Glaciers hold what percent of surface water?
9. What is the salt content of freshwater?
10. Define the following terms: Capillary water: Plankton: Non Point Source pollution: Aquifers: Bedload: Benthic plants: Surface water: Humidity: Relative humidity: Dew Artesian well: Capillary water: Water pollution: Point source pollution: BOD: Gaia effect:
11. What are the major categories of water pollution?
12. What did the “Clean Water Act” accomplish?
13. What did the “Safe drinking Water Act” accomplish?
14. Discuss the hydrological cycle.
15. What is the source of freshwater on earth?
16. What is saltwater intrusion?
17. How many gallons of water are used by a person per day?
18. What is gray water?
19. What are the three steps in elimination of pollution?
20. What is eutrophication?
21. How do you control nutrients and sediments from entering water ways?
22. Who maintains information about water systems in South Carolina?
23. Where does Columbia, SC drinking water come from (two sources)?
24. What does a “Boil Water Advisory” mean?
25. What is the highest level allowed for lead and copper in safe drinking water?
Explanation / Answer
1. Solid (Ice), Liquid (Water), Gas (Vapour)
2. Acid rains are precipitations with ununusally low pH ie. greater concentration of hydrodium ions. While these can be caused by natural sources like fumaroles, they are primarily caused by emission of nitrogen and sulphur compounds produced during human activity that react with water molecules present in air to forn nitric and sulphuric acid respectively.
3. 5.6
4. < 5.6
5. a. Excellent solvent, b. thermal properties (specific heat capacity, anamolous density decrease at 40C), c. adhesion and cohesion properties d. high surface tension (capillary action)
6. Water reacts with CO2 to form carbonic acid (H2CO3) which then splits to give HCO3 and hydrodnium ion (H+). The concentration of these H+ reduce the pH of rainwater making it acidic.
7.
8. 68%
9. <500ppm
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