Bunsen Burner Chemistry

BUNSEN BURNER CHEMISTRY Name: ______________________ How It Works: The Bunsen Burner is used for heating laboratory equipment and chemicals. The flame can reach temperatures of _________________ and is at its hottest when the collar is open. A fine jet of fuel gas is directed through the vertical metal tube. The fuel is commonly natural gas which is principally composed of ________________________________ and small amounts of ethane, propane, and butane. ___________________ is added to the natural gas to give it a smell so that ___________________________________ There are open slots at the side of the vertical tube to allow air into the stream of the natural gas. There are open slots at the side of the vertical tube to allow air into the stream of the natural gas. The natural gas and the air burn in a ____________________________ which produces _______________________________________________________: Natural gas note: C= + oxygen H=  water vapour + O= carbon dioxide BUNSEN BURNER CHEMISTRY Name: ______________________ How It Works: The Bunsen Burner is used for heating laboratory equipment and chemicals. The flame can reach temperatures of 1,500 o C and is at its hottest when the collar is open. A fine jet of fuel gas is directed through the vertical metal tube. The fuel is commonly natural gas which is principally composed of methane and small amounts of ethane, propane, and butane. Sulphur is added to the natural gas to give it a smell so that The natural gas has an odour…this warns us of a gas leak. There are open slots at the side of the vertical tube to allow air into the stream of the natural gas. The natural gas and the air burn in a chemical change which produces new properties: Natural gas + CH4 + note: C= carbon oxygen O2   H = hydrogen water vapour + H2 O + carbon dioxide CO2 O = oxygen ZONE 3: Burning finishes HOT SPOT ZONE 2: Burning starts Water vapour is produced Carbon dioxide is produced ZONE 1: Only mixing occurs here. No burning happens This zone is cold Safety with the Bunsen burner: NEVER sit when using a Bunsen Burner. Clear bench of all materials except a pencil and your lab sheet and lab materials needed. No coats or bags at your desk when using a Bunsen Burner. Store these items in your locker or at the back of the room. Hair should be tied back. No hats. Hair and loose clothing away from the flame! No baggy sweaters. NEVER leave a lit Bunsen burner unattended. NEVER touch Bunsen burner or hot glassware or lab equipment. If a person is in flames, victim should STOP, DROP, and ROLL. Classmates should get a fire blanket. If Bunsen burner “flames out”, or in case of any emergency: TURN OFF THE GAS TAP IMMEDIATELY. How to light the burner: 1. Make sure the gas tap is off. (handle is at 90o angle with the nozzle) 2. Attach the Bunsen burner tube to the gas tap. 3. Air intake holes should be closed. Gas dial should be open. (You are “choking” the air supply in order to improve the fuel/oxygen mixture). 4. Turn on the gas. 5. Ignite with a striker ONLY. Keep the striker close by and ready for use at all times. 6. If the burner doesn’t ignite within 3 or 4 tries, turn off the gas. Let it vent before trying again. 7. Once the burner is lit, adjust the air and fuel to produce a HOT BLUE flame. (using the air intake and gas dial…sometime also using the nozzle control to get a smaller flame). A good flame will be almost INVISIBLE Safety with the Bunsen burner: NEVER _____________ when using a Bunsen Burner. ____________________ of all materials except a pencil and your lab sheet and lab materials needed. No _______________________ at your desk when using a Bunsen Burner. Store these items in your locker or at the back of the room. Hair should be tied back. No hats. _______________________________________________________ No baggy sweaters. NEVER leave a lit Bunsen burner ___________________________ NEVER ____________________ Bunsen burner or hot glassware or lab equipment. If a person is in flames, victim should ________________________________________ Classmates should get a fire blanket. If Bunsen burner “flames out”, or in case of any emergency: _____________________________________________________ How to light the burner: 1. Make sure the gas tap is off. (handle is at 90o angle with the nozzle) 2. Attach the Bunsen burner tube to the gas tap. 3. Air intake holes should be closed. Gas dial should be open. (You are “choking” the air supply in order to improve the fuel/oxygen mixture). 4. Turn on the gas. 5. Ignite with a striker ONLY. Keep the striker close by and ready for use at all times. 6. If the burner doesn’t ignite within 3 or 4 tries, turn off the gas. Let it vent before trying again. 7. Once the burner is lit, adjust the air and fuel to produce a HOT BLUE flame. (using the air intake and gas dial…sometime also using the nozzle control to get a smaller flame). A good flame will be almost ___________________________