4.3b Using a Bunsen burner Components Aithough there are variations in Bunsen burner design, af will have the following essential features: - Base - wide and heary to provide stabity making the bumer less likely to tip over - Gas regulation needle value - controls gas flow into the burner - Gas intake - barbed hose fitting to accept the tubing carrying gas to the burnet. - Air regulation ports - control alir flow into the burner through algnment of inner and outer openings. - Air intake collar - a rotatable cylinder adjusting air port alignment. - Barrel-provides a moing space for gas and air. Question 4.3.5 Match each Bunsen bumer component with a description number 1-3. Each description should be used only once. gas intake. air ports needle valve 1. accepts gas carrying tubing 2. control air flow 3. controls gas now Safety consideration - site preparation A Buinsen burner operates with an open, exposed llame, so safe operation requires careful site preparation. 1. Remove any combustible or flammable materiat trom the atea whore the Bunsen burner will be used. There should not be a shetf or pverheard equipment above this area 2. Loose hair and dothing must be secured close to the body. 3 tocate fire extinguisher, fire exit, and fire alarm. 4. Handle the Bunsen bumer only by tis base or air intake collar to develop the habit of not touching the bamel which will be too hot ta hold after the bumer Safety consideration - site preparation A Bunsen bumer operates with an open, exposed flame, so safe operation requires careful site preparation. 1. Remove any combustible or flammable material from the area where the Bunsen burner wil be used. There should not be a sheff or overhead equipment above this area. 2. Loose hatr and clothing must be secured dose to the body. 3. Locate fire extinguisher, fire exit, and fire alam. 4. Handle the Bunsen bumer onty by its base or air intake collar to develop the habit of not touching the barrel which will be too hot to hold after the burner is in. Question 4.3.6 Use the four ste preparation instructions above to fill in the blanks. Do not enter punctuation. Only exact matches will be scored correct. a. Locate fire ext, and b. Remove any Safety consideration - Bunsen burner setup Proper setup is an essential satoguard for preventing accidents. 1. It avalable, place a heat proot mat under the Bunsen buiner 2. Check that the gag fuel type and the Bunsen burner are compatible. Most ofen natural gas will be the fuel, and the Bunsen bumer wilt have the word. Natural, stamped on ts base. 3. Inspect the tubing by bending it along its length to venty that if is llexable and has no cracks. 4. Close the gas regulation needle valve and postion the air intake collar so the air regulation ports are minimaly open. 5. Attach the tubing to the gas intake on the Bunsen burper and the gas supply valve in the laboratocy. 6. Open the laboratory gas supply value and check that the hiss or smell of escaping gas is not detected. If gas is escaping. close the laboratory gas supply valve and correct the source of the leak which often is a not fully closed neede value Safety consideration - Bunsen burner setup Proper setup is an essensal safeguard for preventing accadents 1. If avaliable, place a heat proof mat under the Bunsen burner. 2. Check that the gas fuel type and the Bunsen burner are compatble. Most often natural gas wit be the fuel, and the Bunsen burner wil have the word, Naturat, stamped on its base. 3. Inspect the tubing by bending it along its length to verify that it is nexite and has no cracks: 4. Close the gas regulation needie valve and postion the air intake collar so the air regulition ports are minimally open. 5. Altach the fubing to the gas intake on the Bunsen bumer and the gas supply valve in the laboratory. 6 Open the laboratory gas supply value and check that the hiss or smell of escaping gas is not detected if gas is escaping, close the laboratory gas supply valve and correct the source of the leak which often is a not fulty closind needle value. Question 4.3.7 Use the sox Bursen bumer sefup instructions above to fial in the blanks. Do not enter punctuation Only exact matches will be scored correct. a. Check that the b. Altach the tubing to the and the are compatible. laboratory Satety consideration - lighting the Bunsen burner A fint lighter or a satefy lighter can be used as an ignition source. Matches are not recommended. If a fint lighter is used. 1. Practice using the fint ingter with the gas turned of you have never used the lighter belore. 2. Hold the fint lighter off center and a few inches above the top of the barrel. 3. Sightly open the gas regulation neede valve and thike the fint lighter to create a spark above the barre. 4. Pull the fint lighter away trom the Bunsen burner as soon as the Bunsen burner ignites. 5. Wat the air regulation ports neaffy closed, the flame should be a yellow satety flame. If a safety lighter is used 1. Light the satefy lighter before turning on the gas. 2 Slightly open the gas regulation needle value, bring the burning solety lighter alongside the barrel, and slowiy rabe the salety lighter above the top of Safety consideration - lighting the Bunsen burner A fint bighter or a safety lighter can be used as an ignifion source. Matches are not recommended If a fint lighter is used 1. Practice using the fint lohter with the gas turned of it you have never used the bighter belofe 2 Hold the fint lighter off center and a few inches above the top of the barret. 3. Sightly open the gas regutation needle valve and strike the fint lighter to create a spak above the barrel. 4. Pull the fint lightes away from the Bunsen bumer as soon as the Bunsen burner ignites. 5 With the air regulation ponts nearly closed, the flame should be a yelow safety flame. If a safely lighter is used: 1. Light the safety lighter betore turning on the gas. 2 Sightly open the gas regulation needle value, bring the burning safety lighter ilongside the barted, and slowby rase the salefy ighter above the lop of the barrei. 3. Extinguish the safety lighter and pull a away trom the Bunsen bumer as soon as the Bunsen burner igntes. 4. With the air regulation ports nearly closed, the flame should be a yellow saluty flame. Question 4.3.8 Use the five inghting the Bunsen burner with a fint lightor instructions above to fill in the blunks. Do not enter punctuation. Onty exact matches will be scored correct a. Pull the away from the as coon as the Alumen bumer ignites b. Practice using the wath the turned off Safety consideration - adjusting and using the flame After lighting. the intial flame will be a yellow safety name which should never be used tor heating Use the gas regulation needie valve and the ar intake collar to adjust the fime. 1. Opening the gas regulation needle value will increase the hoght of the flame above the top of the Bunsen burner 2. Adsuting the air intake collar to open the air regulation ports will create a flame with the inner and outer cones shown in Figure 4.32 3. The tp of the inner cone should be used for heating. This is the hottost part of the thame wath a temperature of aboit 1560C. 4 Never reach over a ili Bunsen burner. 5. Never leave a it Bunsen burner unattended Safety consideration - adjusting and using the flame Afler lighting, the infiat fame will be a yellow salety flame which should never be wied for heating. Use the gas regudation needle valve and the air intake collar to adpunt the flame. 1. Opening the gas reguation needie value will increase the height of the flame above the tog of the Bunsen bumer. 2. Adjusting the air intake collar to open the air regulation poits wit create a fame with the inner and outer cones shown in Figure 4.3.2. 3. The tip of the innes cone should be used for heating. This is the hottest pat of the Bame with a temperature of about 1560C. 4 Never reach over a it Bunsen bumer. 5. Never leave a it Bunsen burner unattended Question 4.3.9 Use the five adjusting and using the flame instrucbons above to nili in the blanks. Do not enter punctuation. Only exact matches will be scored correct. a. Never over a Bunsen burner b leave a it Bunsen burner Safety consideration - extinguishing the flame Remember, the Bunsen burner will remain hot for several minutes after taking the following steps to exingush the flame. 1. Adust the air intake collar to produce the yellow salety fame. 2. Close the gas regulation needie valve to extinguish the flame. 3. Close the laboratory gas supply valve. 4. Wat several minutes for the Bunsen bume to cool. 5. Discornect the fubing from the Bunsen bumer and the laboratory gas fupply valve. 6. Retum the tubing and the Bunsen burner to the approprate sitorage space. Question 4.3.10 Use the sox extinguibhing the fame instructions above to mil in the blanks. Do not enter punctuation. Onlv exact matches will be scored correct the laboratory Use the five adjusting and using the flame instructions above to fill in the blanks. Do not enter punctuation. Only exact matches will be scored correct. a. Never over a Bunsen bumer. b. leave a lit Bunsen bumer Safety consideration - extinguishing the flame Remember, the Bunsen bumer will remain hot for several minutes after taking the following steps to extinguish the flame: 1. Adjust the air intake collar to produce the yellow safely llame. 2. Close the gas regulation needle valve to extinguish the flame. 3. Close the laboratory gas supply valve. 4. Wait several minutes for the Bunsen burner to cool 5. Disconnect the tubing from the Bunsen bumer and the laboratory gas supply valve 6. Return the tubing and the Bunsen burner to the appropriate storage space. Question 4.3.10 Use the sox extinguishing the flame instructions above to fill in the blanks. Do not enter punctuation. Only exact matches will be scored correct. a. the laboratory valve. b. Close the gas regulation