Fire Safety and Chemical Handling Procedures

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Questions and Answers

What does PASS stand for in relation to fire extinguishers?

Pull, Aim, Squeeze, Sweep (correct)

Push, Aim, Squeeze, Slide

Pull, Avoid, Squeeze, Sweep

Push, Aim, Sweep, Squeeze

How long should an eyewash station be used?

15 minutes

What is the main precaution for gas cylinders?

Visually check that gas cylinder is restrained and keep a safe distance around it

Which types of signs convey information about chemical storage?

Gas cylinder Signup and view all the answers

What information is needed to communicate with emergency responders?

Any chemicals involved in an incident, any hazards present in the lab, how the incident happened Signup and view all the answers

What is the best way to smell a chemical sample?

Use your hand to gently waft the smell toward you Signup and view all the answers

What is the last step of any spill cleanup procedure?

Wipe down the affected area with detergent and water Signup and view all the answers

How should students prepare to use chemicals in the lab?

Locate the spill kits and understand how they are used. Become familiar with the chemicals to be used, including exposure or spill hazards Signup and view all the answers

What is the extra step in cleaning up acid and base spills?

Neutralize the spill before cleaning it up Signup and view all the answers

What are the best practices for safely handling waste in the lab?

Check labels or instructions before disposal Signup and view all the answers

When should you remove goggles in the lab?

When everyone in the room is done handling chemicals Signup and view all the answers

What should you do before you heat glassware on a hot plate?

All of the above Signup and view all the answers

What is the best time to clean glassware after use?

As soon as practical after use Signup and view all the answers

Where should glassware be stored after it is cleaned?

In a drying oven, or designated locations such as drawers or buret racks Signup and view all the answers

What is accuracy?

A description of how close a measurement is to the true value of the quantity measured Signup and view all the answers

What is precision?

The degree to which repeated measurements show the same result Signup and view all the answers

With results of 32.9 mL and a standard deviation of 0.3 mL, what is the standard way to report the result?

32.9 + 0.3 mL Signup and view all the answers

What is random error?

An error that occurs when the selected sample is an imperfect representation of the overall population Signup and view all the answers

What is systematic error?

Error that shifts all measurements in a standardized way, decreases accuracy, can result in bias Signup and view all the answers

Systematic error is caused by _, while random error is caused by _

Systematic error is caused by improper use of a measuring device, while random error is caused by random fluctuations in a measuring device Signup and view all the answers

Study Notes

Fire Safety Procedures

Use the PASS method for operating a fire extinguisher: Pull the pin, Aim the nozzle, Squeeze the handle, Sweep the extinguisher side to side.

Eyewash Station Usage

An eyewash station should be used for a minimum of 15 minutes in case of exposure.

Gas Cylinder Precautions

Visually inspect gas cylinders to ensure they are restrained. Maintain a safe distance from the cylinders.

Chemical Storage Signage

Signs used for chemical storage include hazard signs, NFPA (National Fire Protection Association) labels, and gas cylinder identification.

Communication with Emergency Responders

Provide emergency responders with information about chemicals involved, hazards present, and details on how the incident occurred.

Smelling Chemical Samples

To safely smell a chemical sample, gently waft the smell towards you using your hand.

Spill Cleanup Procedure

The final step in cleaning a spill is to wipe down the affected area with detergent and water.

Chemical Handling Preparedness

Students should locate spill kits, understand their usage, and familiarize themselves with any chemicals and their associated hazards.

Acid and Base Spill Cleanup

For acid and base spills, it's essential to neutralize the spill before proceeding with cleanup.

Waste Handling Best Practices

Always wear personal protective equipment (PPE) and check labels or disposal instructions before discarding waste.

Goggles Usage

Remove goggles only after all individuals in the lab have completed handling chemicals.

Heating Glassware Safety

Before heating glassware on a hot plate, check for cracks, inspect for frayed cords, and ensure the glassware is suitable for heating.

Cleaning Glassware

Clean glassware as soon as practical after use for optimal results.

Glassware Storage

After cleaning, store glassware in a drying oven or designated areas like drawers or buret racks.

Accuracy vs. Precision

Accuracy reflects how close a measurement is to the true value, while precision measures the consistency of repeated measurements.

Reporting Measurement Results

Report a result with a standard deviation by stating it in the form: measurement ± standard deviation (e.g., 32.9 ± 0.3 mL).

Types of Error

Random errors occur due to the sample being an imperfect representation of the population, while systematic errors shift measurements consistently, affecting accuracy and introducing bias.

Causes of Errors

Systematic errors are caused by improper measuring device usage, while random errors stem from fluctuations in the measuring device.

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Description

This quiz covers essential fire safety procedures, proper usage of eyewash stations, and safety practices for handling chemicals and gas cylinders. Test your knowledge on emergency response communication and spill cleanup protocols to ensure a safe working environment.