Questions and Answers
What should you check before using a Bunsen burner?
Make sure all equipment is clean and in good working order, and that all materials needed are available.
What is the purpose of a fire blanket?
A fire blanket is used to suffocate flames by removing the oxygen supply.
You should wear safety goggles and remove jewelry when using a Bunsen burner.
True
What should you do if you find cracks in the gas supply line?
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How should the supply hose be connected to the Bunsen burner?
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You can handle the Bunsen burner by any part once it is lit.
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What are the main parts of a Bunsen burner?
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Where is the hottest part of the flame located?
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The lowest oxygen required for combustion is supplied at the top of the barrel from the surrounding air when the collar is turned to a position that ___ air ports.
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Match the following Bunsen burner parts with their functions:
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What is the definition of 'base' in relation to a Bunsen burner?
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What is the function of the 'collar' on a Bunsen burner?
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What is the 'barrel' in context of a Bunsen burner?
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What does 'hot part' refer to in terms of a Bunsen burner?
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Define 'cooler part' in relation to a Bunsen burner.
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What is the definition of an 'air hole' in a Bunsen burner?
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What is the 'gas hose' in a Bunsen burner setup?
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What does 'metal base' refer to in the context of a Bunsen burner?
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Study Notes
Safety Precautions
- Ensure all laboratory equipment is clean and operational before use.
- Familiarize yourself with the location and operation of safety equipment, such as fire blankets and extinguishers.
- Dress appropriately by wearing safety goggles, securing long hair, tucking in loose clothing, and removing risky accessories like jewelry.
Bunsen Burner Setup
- Inspect gas supply lines for cracks; replace tubing if any visible damage is found.
- Securely connect the supply hose to the gas main and Bunsen burner, ensuring no gas escapes except through the burner.
- Always handle the burner by the base or collar to avoid burns from hot surfaces after ignition.
Bunsen Burner Components
- The base provides stability and prevents tipping; the upright section is the barrel.
- The collar, located at the base of the barrel, can be rotated to adjust the air ports for controlling air intake during combustion.
- The needle valve controls gas flow into the barrel, crucial for mixing with air to generate the flame.
Flame Characteristics
- The hottest part of the flame is located at the tip of the inner flame.
- Air and gas mix in the barrel; maintaining air ports open yields a hotter, safer flame.
- Closing the air ports produces a cooler yellow flame, referred to as the safety flame, which is less hazardous when not in use.
Flame Control
- The mixture ratio of gas to air affects the heat produced; equimolar amounts result in the hottest flame.
- Adjusting both the needle valve and collar provides control over flame height and temperature; small openings yield a smaller hot flame while larger openings create a taller one.
Key Parts of the Bunsen Burner
- Base: The part that rests on the work surface, ensuring stability.
- Collar: Adjustable component for regulating air flow through air ports.
- Barrel: The upright portion where gas and air mix for combustion.
- Air hole: Allows air into the barrel for mixing with gas.
- Gas hose: Connects the burner to the gas supply for fuel delivery.
- Metal base: Enhances stability of the burner.
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Description
This quiz covers essential safety precautions for laboratory work, particularly when using a Bunsen burner. It includes guidelines on securing laboratory equipment, proper handling of the burner, and understanding its components. Test your knowledge on maintaining a safe laboratory environment.