CHAPTER 2 AIR AND WATER SEMESTER 2











CoCl2  + 6H2O   ----   CoCl2.6H2O
anhydrous cobalt chloride --- blue
hydrated cobalt chloride --- pink

QUESTIONS

1.Write  chemical  equations  for the following reactions.

a.anhydrous copper sulphate reacting with water.
b. anhydrous cobalt (II) chloride with water











WATER TREATMENT











Related image


Image result for water purification steps















Image result for the fractional distillation of air













QUESTIONS

1.Why is nitrogen used in food packaging?
2.What are coagulants?
3. How Catalytic converters helps to reduce pollution?










 




















 































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