Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Steps to Lighting a Bunsen Burner 2012

22,499 views

Published on

SBEC Chemistry Lab - Steps to Lighting a Bunsen burner

Published in: Education, Technology, Business
  • Be the first to comment

Steps to Lighting a Bunsen Burner 2012

  1. 1. Technique – Bunsen Burner Setup Burner Tubing - should have no cuts or deep cracks so that gas would leak. Main gas valve – turns gas on or off Barrel – adjusts air Needle valve – adjusts fuel (gas) and height of flame
  2. 2. Technique – Bunsen Burner Setup1. Examine the Bunsen burner tubing for cuts and deep cracks. 2. Attach the burner tubing securely to the main gas valve. 3. Screw the barrel and the needle- valve all the way in (closed), then OPEN then about 1 turn.
  3. 3. Technique – Lighting a Bunsen Burner4. Turn the petcock (main gas valve handle) until it points straight, toward the rubber hose, and then…… Closed Open
  4. 4. Technique – Lighting a Bunsen Burner ……. Hold a striker just above the barrel top, and squeeze the striker handle to create a spark.
  5. 5. Technique – Adjusting a Bunsen Burner5. Adjust the flame. With the barrel screwed all the way in, the flame will be very “cool” and yellow. Adjust the flame with the needle-valve (fuel) and barrel (air). Yellow, “luminous” flame • Dirty • Not very hot
  6. 6. Technique – Adjusting a Bunsen Burner6. With the barrel screwed all the way in, the flame will be very “cool” and yellow. To adjust the flame the needle- valve (fuel) and barrel (air) will need to be adjusted.  Unscrew the barrel (holding the base of the barrel) until the flame is blue and all yellow is gone.  Don’t add so much air that your hear a “roar.” Your flame should be “silent” and blue.
  7. 7. Technique – Adjusting a Bunsen Burner6. With the barrel screwed all the way in, the flame will be very “cool” and yellow. To adjust the flame the needle- valve (fuel) and barrel (air) will need to be adjusted.  The height of the flame can be raised by opening the needle valve (fuel).  To most efficiently heat a sample, the tip of the inner blue cone should be touching the object to be heated.
  8. 8. Perfect Flame - Silent, Blue (Non-luminous) Outer cone – not very hot The tip of the innerNot very hot blue cone should be touching the object to be heated.
  9. 9. Technique – Turning Off a Bunsen Burner7. Turn the petcock (main gas valve handle) until it points perpendicular to the burner tubing, all the way to the left OR all the way to the right. Open CLOSED Never leave a lit Bunsen Burner unattended.

×