Laboratory Safety and Chemical Management

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Questions and Answers

Which of the following items is not recommended as proper laboratory attire?

Open-toed shoes (correct)

Closed shoes

Safety goggles

Lab gown

What should you do when adding ACID to WATER?

Add equal parts of ACID and WATER at once.

Add WATER to the ACID in large quantities.

Add ACID slowly or in small increments. (correct)

Add ACID quickly to ensure proper mixing.

What is the correct action to take when handling hot objects?

Expose them to air to cool quickly.

Use bare hands to feel the temperature.

Use tongs and/or protective gloves. (correct)

Leave them to cool down.

What should you do in the event of a concentrated acid spill?

Apply baking soda solution. Signup and view all the answers

What is the appropriate first aid measure for a cut from rusted metal?

Bring it to the nearest clinic. Signup and view all the answers

Which item should not be shared between different reagents to avoid contamination?

All of the above Signup and view all the answers

In case of a chemical splash to the eye, what is the best immediate action?

Wash the eye with plenty of water. Signup and view all the answers

What should be done with breakages in the laboratory?

Report them to laboratory staff. Signup and view all the answers

What is a primary cause of accidents in a laboratory setting?

Knowledge or mental attitude Signup and view all the answers

What should be done if there is a chemical spill that requires special attention?

Report it to the instructor or laboratory personnel Signup and view all the answers

Which of the following actions is NOT recommended in the laboratory?

Eating or drinking during lab sessions Signup and view all the answers

When labeling test tubes and containers, what is the main purpose?

To avoid accidental contamination of chemicals Signup and view all the answers

Why is it important to wash hands and face in the laboratory?

To avoid contact poisoning from chemicals Signup and view all the answers

Which of the following is true about handling hazardous chemicals?

Always follow established procedures and ask if in doubt Signup and view all the answers

What should you do with concentrated acids?

Never pour water into concentrated acid Signup and view all the answers

Which laboratory safety symbol indicates a risk of harmful biological agents?

Biohazard Signup and view all the answers

What is the correct way to measure the volume of a liquid using a graduated cylinder?

At eye level and read the lower meniscus Signup and view all the answers

Why should substances not be weighed directly on the balance pan?

It may damage the balance's internal components Signup and view all the answers

Which glassware is specifically used for accurately measuring the volume of liquid required in a chemical reaction?

Graduated Cylinder Signup and view all the answers

What should be done after using the pan of the balance?

Clean it with a designated brush Signup and view all the answers

What is a critical characteristic of a burette used in laboratory settings?

It is designed for accurate volume measurements and controlled dispensing Signup and view all the answers

When transferring liquids to be weighed, what is typically used?

Pipet Signup and view all the answers

What is the purpose of a fume hood in the laboratory?

To control exposure to harmful vapors and adequately ventilate toxic chemicals Signup and view all the answers

What is the recommended practice for managing waste in the laboratory?

Clean the working area and dispose of waste appropriately after laboratory time Signup and view all the answers

What must a student do if they break a borrowed glassware?

Fill up a charge slip form and pay the fee. Signup and view all the answers

How should glass wares be returned to the laboratory?

Washed with detergent, dried, and checked in. Signup and view all the answers

What is the procedure for excessive use of chemicals in a group setting?

The charge will be equally divided among group members. Signup and view all the answers

What is the main reason for limiting the number of students in the balance room?

To ensure safety and avoid crowding. Signup and view all the answers

How should a student approach weighing corrosive chemicals?

Take caution and follow safety protocols for corrosive substances. Signup and view all the answers

What happens if a student does not settle charges for breakages before final examinations?

They may not be allowed to participate in the exams. Signup and view all the answers

What is the purpose of using labeled spatulas in the lab?

To avoid cross-contamination of chemicals. Signup and view all the answers

Which statement is true regarding balances in the laboratory?

Each balance has its own weight limit that must be respected. Signup and view all the answers

What should you do if you suffer from a medical condition affecting you in the laboratory?

Inform your supervisor about your condition. Signup and view all the answers

Which of the following is a safe practice when handling lab chemicals?

Measure chemicals carefully and use the exact amount needed. Signup and view all the answers

When is it necessary to use a fume hood in the laboratory?

For substances that release toxic gases and vapors. Signup and view all the answers

What must be done before borrowing glasswares/apparatus from the stockroom?

Check glasswares for any signs of cracks or chips. Signup and view all the answers

How should hazardous chemical waste be managed in the laboratory?

Use labelled waste bottles provided in the lab. Signup and view all the answers

What must you do after finishing your experiment with glasswares?

Return them clean and in good condition. Signup and view all the answers

Who should obtain the borrower's slip when a group requests additional glasswares?

Only one member of the group is required to fill it out. Signup and view all the answers

What is one dangerous assumption about laboratory substances?

Most substances are lethal, poisonous, and carcinogenic. Signup and view all the answers

Study Notes

Basic Causes of Accidents

Failure to adhere to instructions or established rules can lead to accidents.
Not using protective devices poses significant risks.
Improper use or handling of laboratory materials increases hazard likelihood.
Physical conditions or disabilities may contribute to accident potential.
Mental attitude and lack of knowledge can escalate dangers in the lab.
Utilizing faulty equipment can result in unforeseen accidents.

Safety Rules

Understand chemical properties of substances used in experiments as explained by the instructor.
Always work with a partner when handling hazardous materials; avoid unauthorized experiments.
Eating, drinking, or using cosmetics in the laboratory is strictly prohibited to avoid poisoning.
Participate in no pranks or foolish behaviors to maintain safety for all students.
Immediate reporting of chemical spills to the instructor or lab personnel is crucial.

Laboratory Safety Symbols

Awareness of various hazards indicated by symbols such as:
- Biohazard
- Corrosive Materials
- Flammable Materials
- Electrical Hazards
- Carcinogenic Hazards
Familiarity with safety symbols helps identify risks.

Personal Protective Equipment

Proper laboratory attire includes:
- Lab coat or gown
- Closed-toed shoes
- Safety goggles
- Face masks
- Nitrile gloves

Chemical Handling and Waste Management

Use designated measuring equipment for each reagent; sharing is prohibited to prevent contamination.
Use tongs or gloves for hot objects as glass can appear unchanged after heating.
Never pour water into concentrated acid; always add acid to water slowly.
Utilize fume hoods for toxic vapors and gases to ensure safety.

Accident Preparedness

Lab rooms are equipped with emergency supplies including first aid kits and fire safety equipment.
Report all accidents, spills, or leaks promptly to avoid potential harm.

First Aid Procedures

For chemical burns or splashes, flush the affected area with water for 10 minutes.
Treat concentrated acid spills with baking soda and bases with vinegar.
In case of minor wounds, clean with soap, apply antiseptic, and control bleeding with pressure.

Weighing Substances

Limit balance room access to two students per weighing session to minimize crowding.
Only use clean and appropriate containers for weighing to preserve balance accuracy.
Never move the balance; gently operate controls as needed.

Laboratory Equipment

Fume Hood: Essential for venting harmful fumes and vapors.
Hot Plate: Used for heating liquids and facilitating reactions.
Graduated Cylinder: Accurate measurement of liquid volumes, not for mixing.
Burette: Controlled dispensing of liquids, with zero reading at the top.
Test Tubes and Racks: For small reactions and storage.

Common Observations

Note the initial appearance of reagents before mixing to identify chemical changes.
Familiarity with common observations aids in recognizing reactions or hazards.

Additional Reminders

Maintain a clean workspace and proper waste disposal to ensure lab safety.
Always check for cleanliness and condition of borrowed glassware before returning them.
Understand procedures for handling excess chemicals or breaking lab equipment with appropriate reporting and restitution steps.

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Description

This quiz covers essential guidelines for protecting your health in the laboratory, especially for those with allergies or medical conditions. It also addresses proper chemical usage and waste management practices to avoid accidents and ensure safety during laboratory procedures.