Diffusion of bromine in air

• Equipment

  2 pieces of cotton wool

  one soaked in Hydrochloric acid and another in ammonia solution
• The 2 cotton wools are places individually at

  The ends of a long tube that is called so it is horizontal
• Results-

  After several minuites a white ring of ammonium chloride starts to form nearer the end of the tube where hcl is
• Explanation

  Both cotton wools give off their soaked acid in gas and they diffuse along the tube and when they meet they react to form ammonium chloride
• What is ammonium chloride form

  A white solid
• Does ammonia or HCL diffuse quicker

  Ammonia as it has smaller molecules