Laboratory Safety Practices Quiz

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Questions and Answers

What is the primary purpose of using fume hoods in the laboratory?

  • To store glassware
  • To dispose of waste
  • To dilute chemicals
  • To prevent inhalation of harmful fumes (correct)

It is safe to eat and drink in the chemistry lab as long as proper hygiene is maintained.

False (B)

What should you do if you need to smell a chemical in the lab?

Waft the odor toward your nose with your hand.

The laboratory is considered safe when ______ precautions are taken.

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

Match the following safety practices with their descriptions:

<p>Never eat in the lab = Prevents food contamination with toxic chemicals Never taste chemicals = Avoids ingestion of corrosive substances Use fume hoods = Reduces inhalation of harmful fumes Wafting odors = Ensures safer smelling practices</p> Signup and view all the answers

What should you do if you accidentally spill chemicals on your skin?

<p>Rinse the area with plenty of water immediately (A)</p> Signup and view all the answers

It is acceptable to return unused chemicals to their original containers once you are done using them.

<p>False (B)</p> Signup and view all the answers

What should you use to remove hot containers from a hot plate?

<p>Beaker tongs</p> Signup and view all the answers

Always keep chemicals in __________ areas to ensure safety.

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

Match the following emergency procedures with their appropriate actions:

<p>Safety shower = Rinse off chemicals from your body Fire extinguisher = Put out small fires Eye-wash fountain = Flush chemicals from your eyes Fire blanket = Smother flames on clothing</p> Signup and view all the answers

What is the primary action to take in a toxic atmosphere situation?

<p>Evacuate the contaminated area (A)</p> Signup and view all the answers

A respiratory protection cartridge mask is recommended when dealing with simple wounds.

<p>False (B)</p> Signup and view all the answers

What should you use to treat simple wounds?

<p>Sterile compresses</p> Signup and view all the answers

A hazard label must contain the relevant ____________, describing the hazardous effects of the product.

<p>hazard statements</p> Signup and view all the answers

Match the action to the respective hazard context:

<p>Toxic Atmosphere = Evacuate the contaminated area Simple Wounds = Apply sterile compresses Product Reversal = Ventilate the room Hazard Label = Contains supplier's contact information</p> Signup and view all the answers

What should be done with clothing during lab sessions?

<p>Wear clothing that covers as much skin as possible (D)</p> Signup and view all the answers

Students are allowed to place their book bags on the lab benchtop during the experiment.

<p>False (B)</p> Signup and view all the answers

What should you do if you arrive late to lab?

<p>You may miss safety precautions and the instructor may deny you the privilege of completing the experiment.</p> Signup and view all the answers

At the end of lab sessions, it is essential to return clean glassware to your ______.

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

Match each lab procedure with its description:

<p>Dress Properly = Wear appropriate clothing and footwear Read the Experiment = Understand the experiment prior to lab Work Independently = Focus on individual tasks unless instructed Clean Up at the End of Lab = Return items and leave the workspace tidy</p> Signup and view all the answers

What should you do in the case of thermal or chemical burns?

<p>Put under running water for at least 15 minutes (D)</p> Signup and view all the answers

For eye projections, it is recommended to put the eye under running water for at least 15 minutes and consult an ophthalmologist.

<p>True (A)</p> Signup and view all the answers

What should you never do in case of ingestion burns?

<p>Do not vomit or give anything to drink.</p> Signup and view all the answers

In the event of a fire on a person, you should immobilize the victim and use a __________ to stifle the flames.

<p>fire blanket</p> Signup and view all the answers

Match the types of accidents with the recommended conduct:

<p>Thermal or chemical burns = Put under running water for at least 15 minutes Electrical accident = Cut the power and do not touch the victim Fire on a person = Immobilize and use a fire blanket Eye projection = Rinse under running water and consult ophthalmologist</p> Signup and view all the answers

Which pictogram represents chemicals that can explode?

<p>Exploding Bomb (C)</p> Signup and view all the answers

The Exclamation Mark pictogram is used for chemicals that are highly toxic and cause severe health problems.

<p>False (B)</p> Signup and view all the answers

What type of hazards does the Corrosion pictogram indicate?

<p>Skin corrosion/burns, eye damage, corrosive to metals</p> Signup and view all the answers

The ______ pictogram warns users that the chemical can cause serious health problems including carcinogenic effects.

<p>Health Hazard</p> Signup and view all the answers

Match the following pictograms with their meanings:

<p>Flame = These chemicals burn or can release gases that burn. Environment = These chemicals are dangerous if they get into rivers, lakes, or oceans. Gas Cylinder = Gases and liquids under pressure can explode. Skull and Cross-bone = These chemicals are poisons that quickly cause sickness or death.</p> Signup and view all the answers

Which pictogram would you find on a label of a chemical that is a respiratory irritant?

<p>Exclamation Mark (D)</p> Signup and view all the answers

All chemicals with the Flame pictogram are considered pyrophoric.

<p>False (B)</p> Signup and view all the answers

Which pictogram signifies that the chemical can cause skin burns?

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

Which of the following is NOT a hazard statement associated with the sample substance?

<p>May cause allergic reactions (D)</p> Signup and view all the answers

The signal word on the hazard label is 'Warning'.

<p>False (B)</p> Signup and view all the answers

What is the nominal quantity of the supplied substance?

<p>800ml</p> Signup and view all the answers

The hazard pictograms displayed on the label include a flame icon, an exclamation mark, and a ______.

<p>skull and crossbones</p> Signup and view all the answers

Match the following statements to their correct categories:

<p>IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. = Hazard statement Keep out of reach of children = Precautionary statement Causes skin irritation = Danger Keep away from heat/sparks/open flames/hot surfaces - No smoking = Precautionary statement</p> Signup and view all the answers

What is the correct way to take a measurement using a graduated cylinder?

<p>Take the measurement at eye level from the bottom of the meniscus. (C)</p> Signup and view all the answers

A volumetric flask is used primarily for measuring small volumes of liquid.

<p>False (B)</p> Signup and view all the answers

What type of pipet is used for precise measurement?

<p>Mohr pipets</p> Signup and view all the answers

A __________ is used to measure volumes of liquids in milliliters.

<p>graduated cylinder</p> Signup and view all the answers

Match the following laboratory instruments with their uses:

<p>Graduated Cylinder = Measure volumes of liquids Volumetric Flask = Prepare solutions accurately Pipet = Transfer liquids precisely Flask = Swirl solutions while minimizing loss</p> Signup and view all the answers

Which laboratory equipment is best suited for measuring liquid volume accurately?

<p>Graduated cylinder (D)</p> Signup and view all the answers

Erlenmeyer flasks are primarily used for exact measurements of volume.

<p>False (B)</p> Signup and view all the answers

What is the primary use of a pipette in the lab?

<p>Transferring small volumes of liquids</p> Signup and view all the answers

The __________ is used for grinding solids in a lab.

<p>Mortar &amp; Pestle</p> Signup and view all the answers

Match the following lab equipment with their primary use:

<p>Beaker = Mixing chemicals Funnel = Transferring and separating liquids Test tube = Controlling small amounts of substances Hot Plate = Heating glassware safely</p> Signup and view all the answers

Which piece of equipment is designed to provide support during experiments?

<p>Clamp (B)</p> Signup and view all the answers

Gloves are primarily used for measuring mass in the laboratory.

<p>False (B)</p> Signup and view all the answers

What is the main function of a wire mesh in a laboratory setting?

<p>To prevent direct contact of glassware with a flame.</p> Signup and view all the answers

A __________ is commonly used for heating glassware in a laboratory without direct flame contact.

<p>Laboratory Hot Plate</p> Signup and view all the answers

Which laboratory equipment is mainly utilized for holding multiple items?

<p>Rack (A)</p> Signup and view all the answers

What is the primary use of a buret in laboratory settings?

<p>To measure reagent volumes (C)</p> Signup and view all the answers

Test tube racks can only be used to hold test tubes upright.

<p>False (B)</p> Signup and view all the answers

What is the purpose of a mortar and pestle in a laboratory?

<p>To crush and grind substances into a fine paste or powder.</p> Signup and view all the answers

A _______ is used to pour liquids into narrow-mouth containers.

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

Match the laboratory instruments with their respective functions:

<p>Buret = Measures reagent volumes Ring Stand = Supports laboratory equipment Test Tube Clamp = Holds test tubes and cylindrical equipment Test Tube Brush = Cleans narrow-mouth glassware</p> Signup and view all the answers

Flashcards

Laboratory safety rules

Essential guidelines to prevent accidents and injuries in a chemistry lab.

Food in the lab

Eating or drinking in a lab is strictly prohibited to avoid accidental exposure to toxic chemicals.

Inhaling fumes

Never inhale chemical fumes directly. Use fume hoods (if available) for dangerous chemicals. Waft odors gently with your hand.

Tasting chemicals

Never taste any chemical, as even tiny amounts can be poisonous or corrosive.

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Chemical handling

Proper and careful handling of chemicals is critical in a chemistry lab to mitigate risks associated with chemical reactions.

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Flammable Chemicals

Chemicals that easily catch fire and burn.

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Oxidizers

Chemicals that can accelerate or support combustion in other materials.

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Explosive Chemicals

Chemicals that can detonate or explode violently.

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Pressurized Gases

Gases or liquids stored under high pressure that can release dangerous energy.

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Corrosive Chemicals

Chemicals that damage or destroy metals, skin, or eyes.

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Hazardous Chemicals (Health)

Chemicals that may cause serious health problems, including cancer and birth defects.

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Toxic Chemicals

Chemicals that can cause sickness or death.

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Irritant Chemicals

Chemicals that cause irritation of skin or eyes.

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Unauthorized Experiments

Never perform an experiment without an instructor present. It's important to follow the lab guidelines and ensure proper supervision for safety.

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Chemical Disposal

Waste chemicals must be disposed of according to specific instructions, either in a designated container or down the sink. Your instructor will provide guidance.

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Broken Glassware

Broken glassware should be disposed of immediately by placing it in a designated crock. Get new glassware from your instructor.

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Hot Objects

Burns are common in a lab. Be cautious when handling hot objects and use appropriate tools like beaker tongs to avoid touching them.

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Emergency Procedures

In case of an accident, immediately notify your instructor. Learn the location and use of safety equipment like showers, fire extinguishers, and eye washes.

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Toxic Atmosphere

A dangerous environment where the air contains harmful gases or substances.

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Simple Wounds

Minor injuries like cuts or scrapes.

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Product Reversal

Steps to take when a hazardous chemical spills.

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Hazard Pictogram

A symbol representing the specific hazards of a substance.

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Precautionary Statement

Instructions on how to handle a substance safely.

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Burn Treatment (Water)

In case of thermal or chemical burns, immediately flush the affected area with running water for at least 15 minutes. Seek medical attention after.

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Eye Rinse

For chemical splashes in the eye, use an eye rinse immediately. Flush for at least 15 minutes, then consult an ophthalmologist.

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Proper Lab Attire

Wear clothing that covers most skin, avoid sandals, secure loose clothing and long hair, prefer older clothes.

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Fire on a Person

If someone catches fire, immediately lay them down. Stifle the flames with a fire blanket, removing synthetic clothing (except those touching the skin). Do NOT use a fire extinguisher on a person.

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Pre-Lab Reading

Read the entire experiment before coming to lab, the instructor will briefly discuss it at the start

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Electrical Accident Response

In electrical accidents, immediately cut or have the power shut off by a qualified person. Do not touch the victim, and prevent others from approaching. Electric burns are extremely serious.

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Lab Time Management

Arrive on time, work independently unless instructed, take planned breaks only

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Ingestion Burns

If someone ingests a burning chemical, do not induce vomiting. Do not give them anything to drink. Keep the product's packaging or label for medical assistance.

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Keeping Lab Space Organized

Only essentials on the benchtop, keep drawers closed except when accessing items, keep personal items in designated areas.

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Lab Cleanup

Return clean glassware to the drawer, clean your benchtop, wash your hands, turn off all equipment and water.

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Signal Word

A word like 'Danger' or 'Warning' on a label that alerts you to the severity of the hazard.

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Hazard Statement

A short phrase that explains the specific dangers of a substance.

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Supplemental Info

Additional information about the substance that is not legally required on the label.

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Buret

A precise measuring tool with a stopcock, used for dispensing specific volumes of liquid, especially in titration.

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Ring Stand

A metal stand with a vertical rod, used to support various lab equipment with clamps and rings.

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Test Tube Clamp

A clamp attached to the ring stand, used for securely holding test tubes and cylindrical glassware.

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Test Tube Rack

A holder for test tubes, for keeping them upright or drying them upside down.

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Test Tube Brush

A specialized brush used for cleaning the inside of test tubes and narrow-mouthed glassware.

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Graduated Cylinder

Used to measure the volume of liquids in milliliters (mL). Measurements are taken at eye level from the bottom of the meniscus, the concave curved surface of the liquid.

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Volumetric Flask

A flask used to prepare solutions of a specific volume by dissolving a measured amount of solid in a solvent.

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Pipet (Pipette)

Used for precise measurement and transfer of liquids. Mohr pipets are common, graduated pipets.

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Meniscus

The curved surface of a liquid in a container. Measurements should be taken from the bottom of the meniscus when using a graduated cylinder.

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Flasks (vs. Graduated Cylinders)

Flasks are designed for mixing and swirling solutions, but their graduations are not very accurate for measuring volumes. They are used to collect vapors or condensed liquids with stoppers.

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Beaker

Used for mixing, dissolving, and approximate liquid volume measurements. Their accuracy is poor.

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Erlenmeyer Flask

Similar to a beaker, but with a narrow neck, used for mixing, dissolving, heating or cooling solutions. They are not as accurate as graduated cylinders.

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Pipette

Used for precise measurement and transfer of liquids. Mohr pipets are common, graduated pipets.

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Funnel

Transferring liquids into a container, separating solids and liquids.

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Mortar and Pestle

Grinding solids.

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Watch Glass

Containing and holding substances.

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Laboratory Hot Plate

Heating glassware/chemicals safely.

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Electronic Balance

Measuring mass accurately.

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Study Notes

Lab Safety Rules

  • Never perform unauthorized experiments and never work in the lab without an instructor in charge.
  • Never remove anything (chemicals, glassware, etc.) from the lab.
  • Label all containers to identify their contents.
  • Never put anything back into a reagent bottle. Once a reagent has passed the mouth of its container, it has passed the point of no return.
  • Always take as little of a chemical as possible. Use only clean, dry spatulas for removing chemicals from bottles.
  • Properly dispose of excess chemicals.
  • Leave chemicals in their proper place. Do not carry original containers of chemicals to your benchtop.
  • Avoid touching hot objects. Burns are a common accident in the chemistry lab.
  • Be careful when using hot plates and objects which have been heated on them.
  • Rinse spills off skin immediately. Rinse off any chemicals spilled on the skin immediately with large amounts of water.
  • Clean up broken glassware immediately. Place it in the labeled crock at the front of the lab. Obtain replacement glassware from the instructor.
  • Properly dispose of waste chemicals. Certain liquids can be poured into the sink and flushed with water while others are poured into designated waste containers. Most solid wastes are placed in designated crocks. Your instructor will provide disposal instructions each lab.
  • Notify your instructor immediately of all accidents.
  • Learn to locate and operate (if applicable) the safety shower, fire extinguisher, eye-wash fountain, fire blanket, and fire exit.

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