Chlorine and hypochlorite

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Chlorine and hypochlorite

• Cl2 and ClO-

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1.Uses of chlorine and hypochlorite

• Activity
• Searching for the information on the uses of
  chlorine

Chlorine and hypochlorite
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2.Manufacturing of chlorine by electrolysis

• Activity
• Designing and performing experiment to make
  chlorine bleach

Chlorine and hypochlorite
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3.Properties and reactions of Cl2

• a. Bleaching action of aqueous Cl2
• b. Reactions with aqueous halides
• c. Reaction with dilute sodium hydroxide
  solution

Chlorine and hypochlorite
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4.Sodium hypochlorite as the active ingredient in
chlorine bleach
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5.Properties and reactions of sodium hypochlorite

• a. Bleaching action
• b. reaction with dilute acids

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6.Potential hazards associated with the use of
chlorine bleach
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Test for chlorine

• Cl2 turns moist blue litmus to red and bleach it.

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Use of chlorine, Cl2

• Sterilizing water
• Insecticides or weedkillers(??)
• Making solvent like, CCl4, CH3CCl3, for grease
  removal
• Making plastic polyvinylchloride, PVC
• Making Dettol, TCP, DDT
• Making Bleaching agent
• Act as disinfectant in swimming pool
• Making antiseptic, NaClO

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Story of DDT

• 1874 a research student first made.
• 1934 Paul Mueller develop DDT
• DDT helps Allies fight malaria(??), dusting with
  DDT keep troops free from lice(?)
• 1948, Mueller awarded Nobel prize
• In 60s, some housefly resists DDT
• DDT concentrate up a food chain