Part 2 of Halogens too big

• Reaction of CI- with sulphuric acid

  Steaming fumes, pH change, bubbles, HCI, no oxidation or reduction
• Reaction of Br- with sulphuric acid

  Bubbles, pH charge, colourless gas, HBr, Br2, SO2, Br is oxidised, H2SO4 is rediced
• Reaction of I- with sulphuric acid

  Bubbles, pH change, colourless gas, egg smell, purple cloudy fumes, HI, I2, SO2, H2S
• Which halide doesn't react with sulphuric acid?

  Chloride
• Rule for reacting halides with concentrated H2SO4

  Power of reducing agent increases, H2SO4 becomes more reduced
• What is the difference between the iodide and bromide reaction?

  Iodide releases purple fumes instead of brown
• Which halide ions are displaced by chlorine water?

  Bromide and iodide
• Why does the reducing power of halides increase down the group?

  Larger ions lose electrons more easily, so less attraction, distance increases, greater shielding
• Chlorine and water form?

  HCI and chloric acid
• What is chloric acid?

  Strong oxidising agent, kills bacteria via oxidation, bleach,
• What type of reaction is chlorine and water

  Disproportion reaction
• Pros of using Chlorine water treatment

  Kills bacteria, safe to drink and swim, prevents growth of algae, reducing bad smells and discolouration
• Cons of using chlorine water treatment

  Chlorine is toxic, irritates the respiratory system, causes chemical burns if concentrated, and reacts with organic compounds to form a carcinogen
• CI and NaOH gives

  NaCIO + NaCI + H2O
• Use of NaOH and CI

  Bleach, its a disproportional reaction
• Chemical name of active ingredient which is present in bleach

  Sodium chlorate
• What would happen to the universal indicator if you added it to chlorine water?

  Paper (red to white), but solution (red to colourless)