Chlorine (17)

  1. Chlorine is present in such minerals Halite (NaCl – Sodium Chloride), Sylvite (KCl – Potassium Chloride), and Carnallite (Potassium Magnesium Chloride Hexahydrate).
  2. About 1.9% of the mass of seawater is chloride ions.
  3. Second lightest Halogen, after Fluorine.
  4. It has the highest electron affinity and the third highest electronegativity of all the reactive elements.
  5. Elemental Chlorine is commercially produced from brine by Electrolysis – of Sodium chloride dissolved in water.
  6. The high oxidizing potential of Elemental Chlorine led to free chlorine’s bleaching and disinfectant uses, as well as reagent in the chemical industry.
  7. Elemental Chlorine at high concentrations is extremely dangerous and poisonous.
  8. Solutions of Chlorine in water contain chlorine (Cl2), Hydrochloric Acid, and Hypochlorous Acid: 

    9. Cl2 + H2O → HCl + HClO

    • Electrolysis of Brine produces Chlorine, Hydrogen, & Sodium Hydroxide:

                            2NaCl + 2H2O → Cl2 + H2 + 2NaOH

    1. Salts such as Calcium Chloride, Magnesium Chloride, Potassium Chloride have varied uses ranging from medical treatments to cement formation.