Laboratory Safety and Bunsen Burner Setup

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?

Replace the tubing. Signup and view all the answers

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

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

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

False Signup and view all the answers

What are the main parts of a Bunsen burner?

The base, barrel, collar, and air ports. Signup and view all the answers

Where is the hottest part of the flame located?

At the tip of the inner flame. 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.

closes Signup and view all the answers

Match the following Bunsen burner parts with their functions:

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

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

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

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

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

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

The upright part of the burner where the flame occurs. Signup and view all the answers

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

The tip of the inner flame. Signup and view all the answers

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

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

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

An opening that allows air to enter the burner. Signup and view all the answers

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

The flexible tubing that carries gas to the burner. Signup and view all the answers

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

The sturdy part that supports the burner. 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.