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Reaction of Sodium with Chlorine

Hazards

  • Chlorine is toxic. Fill cylinders only in the hood.
  • Sodium metal is highly reactive (reacting with both air and water). Keep it stored under oil.

Chemicals and Solutions

  • Chlorine gas
  • Sodium metal

Materials

  • Glass deflagrating spoon
  • Large hydrometer with glass square cover
  • Forceps and knife
  • Burner and matches

Procedure

  1. Before class fill the hydrometer with chlorine gas and cover.
  2. Using forceps and a knife, cut a pea sized piece of sodium metal .
  3. Place the sodium in the glass deflagrating spoon and melt it using a burner (the oil should burn off the surface).
  4. Place the deflagrating spoon of melted sodium in the chlorine and gently shake.
  5. The orange glow of sodium reacting with chlorine will be seen.

Discussion

Reaction:

\( \ce{ Na + 1/2 Cl2 -> NaCl ~~~~ -411 kJ/mole } \)

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