REACTIONS OF CHLORINE AND WATER/ NaOH (aq)

• REACTION OF CHLORINE WITH WATER?

  Cl2 + H2O ⇌ HCl + HClO
• HOW DOES THE REACTION WITH CHLORINE CHANGE IN BRIGHT LIGHT?

  HOCl -> HCl + 1/2O2

  Therefore

  Cl2 + H2O -> 2HCl + 1/2O2
• WHAT DOES CHLORINE DO IN WATER?

  disproportionates and appears pale green

  -> changed by bright light
• USES OF CHLORINE IN WATER?

  small amounts added to water to kill microbes

  -> amounts are low enough to kill microbes but not harm humans as toxic
• REACTION OF CHLORINE AND COLD, DILUTE NaOH (aq)?

  Cl2 + 2NaOH -> NaCl + NaClO + H2O

  -> chlorine disproportionates to make bleach