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Laboratory Safety and Bunsen Burner Setup
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Laboratory Safety and Bunsen Burner Setup

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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?

<p>Replace the tubing.</p> Signup and view all the answers

How should the supply hose be connected to the Bunsen burner?

<p>It should be pushed well onto the ribs and secure on both ends.</p> Signup and view all the answers

You can handle the Bunsen burner by any part once it is lit.

<p>False</p> Signup and view all the answers

What are the main parts of a Bunsen burner?

<p>The base, barrel, collar, and air ports.</p> Signup and view all the answers

Where is the hottest part of the flame located?

<p>At the tip of the inner flame.</p> Signup and view all the answers

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.

<p>closes</p> Signup and view all the answers

Match the following Bunsen burner parts with their functions:

<p>Base = Provides stability Collar = Controls air supply Barrel = Contains the flame Air ports = Allow air to mix with gas</p> Signup and view all the answers

What is the definition of 'base' in relation to a Bunsen burner?

<p>The bottom of the burner that rests on the bench top.</p> Signup and view all the answers

What is the function of the 'collar' on a Bunsen burner?

<p>The collar can be rotated to expose slots for air to mix with gas.</p> Signup and view all the answers

What is the 'barrel' in context of a Bunsen burner?

<p>The upright part of the burner where the flame occurs.</p> Signup and view all the answers

What does 'hot part' refer to in terms of a Bunsen burner?

<p>The tip of the inner flame.</p> Signup and view all the answers

Define 'cooler part' in relation to a Bunsen burner.

<p>The flame that burns yellow when there is insufficient air.</p> Signup and view all the answers

What is the definition of an 'air hole' in a Bunsen burner?

<p>An opening that allows air to enter the burner.</p> Signup and view all the answers

What is the 'gas hose' in a Bunsen burner setup?

<p>The flexible tubing that carries gas to the burner.</p> Signup and view all the answers

What does 'metal base' refer to in the context of a Bunsen burner?

<p>The sturdy part that supports the burner.</p> Signup and view all the answers

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.

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