List the impurities present in rainwater.

Rainwater contains both dissolved and suspended impurities. Some of the common impurities include dust particles, gases like carbon dioxide and sulfur dioxide, and dissolved salts. It may also contain microorganisms and organic matter from the atmosphere.

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  2. In what ways do industrial wastes pollute water?
  3. What is water pollution?
  4. List some waterborne diseases.
  5. What are pathogenic microorganisms?
  6. What is hard water? Why is it sometimes undesirable?
  7. List two ways in which lakes and streams become polluted.
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  9. Give a chemical equation for the reaction of carbonated rainwater with limestone.
  10. Write a chemical equation for the reaction that occurs when temporary hard water is boiled.
  11. Write a chemical equation for the interaction of Ca²⁺ ions with sodium zeolite.
  12. How can buildings made of limestone be affected by acid rain?
  13. Make a list of main methods of softening hard water. In each case, write an equation to summarize chemical reactions involved.
  14. List some disadvantages of water hardness.
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  16. How does hard water differ from soft water?
  17. Write balanced chemical equation to show the effect of heat on magnesium hydrogen carbonate in an aqueous solution.
  18. Describe the water treatment process in municipal water supplies.
  19. ENVIRONMENTAL CHEMISTRY-WATER
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