Lab Techniques & Safety: Crash Course Chemistry #21

CrashCourse
8 Jul 201309:02
EducationalLearning
32 Likes 10 Comments

TLDRThe video outlines lab safety guidelines through personal anecdotes, starting with attire - hair up, no loose clothes/jewelry, closed-toed shoes - and behavior, like not eating, working alone, or tasting chemicals. It explains lab equipment like chemical diamond coding, safety sheets, fume hoods, and eye wash stations. It advises on techniques like committed pouring, safe stoppering, and proper chemical disposal. It covers common injuries like cuts and chemical burns, warning against hesitating in emergencies. The key is knowing safety protocols for every chemical before starting work to prevent environmental harm and mitigate risk.

Takeaways
  • 😀 Tie back long hair and avoid loose clothing to prevent fires/accidents
  • 😷 Wear PPE like goggles, gloves, closed-toe shoes to protect yourself
  • 🙅‍♀️ Don't eat, drink or pipette by mouth in the lab
  • ⛔️ Understand chemical hazards using MSDS sheets before handling
  • 😨 Use fume hoods when working with noxious chemicals
  • 😱 Always know proper disposal methods before starting an experiment
  • 😰 Avoid broken glass injuries by cleaning up properly
  • 😡 Never force glass through stoppers to prevent severe cuts
  • 🧤 Wear aprons and have safety showers available
  • 👂 Listen to safety instructions and confess all exposure incidents
Q & A

  • Why should long hair always be tied up in the lab?

    -Long hair should always be tied up in the lab because it can catch on fire if exposed, knock things over, obstruct vision, or dip into flasks.

  • What are some recommended clothing choices for working in a lab?

    -Recommended clothing for working in a lab includes long sleeves, pants, closed-toed shoes and socks - items that cover the body as much as possible to protect from spills or splashes.

  • What kind of eye protection should be worn in a lab?

    -Proper eye protection like safety goggles or glasses should always be worn in a lab. Regular eyeglasses do not provide enough protection on their own.

  • Why is eating and drinking discouraged in lab environments?

    -Eating and drinking is discouraged in labs because chemicals or contaminants could accidentally get into food or drink if proper precautions aren't followed, leading to safety issues if ingested.

  • What does each part of the Hazardous Material diamond signify?

    -The blue, red, and yellow sections rate health hazard, flammability hazard, and reactivity hazard on a 0-4 scale. Underneath lists extra hazards like radioactivity.

  • What is an MSDS and what kind of information does it contain?

    -An MSDS (Material Safety Data Sheet) provides detailed hazard information and safety precautions for working with a specific chemical substance in the lab.

  • How can you safely smell a chemical in the lab?

    -Never directly smell a chemical. Instead, waft some of its vapor gently toward your nose using your hand to determine what it smells like.

  • Why should glass tubes or rods never be forced through stoppers by hand?

    -Forcing glass through a stopper by hand risks breakage, which could lead to severe cuts or injury. Use lubricant and hold very close to reduce hazard.

  • How can chemicals be safely disposed after experiments?

    -Most chemicals require specific disposal methods that depend on their properties and hazards. Never dump anything until the proper disposal method is confirmed.

  • What emergency wash is designed to rapidly rinse the body?

    -Safety showers provide a high-volume water flow to rapidly rinse the body in case of emergency chemical exposure or contamination.

Outlines
00:00
😨 Safety Hazards and Accidents in the Lab

The first paragraph describes some frustrating and dangerous moments that can happen in a lab environment, like experiments being ruined or injuries occurring. It then previews the overall video topic of lab safety and techniques for proper equipment usage.

05:02
😷 Protective Equipment and Safe Lab Practices

The second paragraph provides recommendations for safe lab attire like tied-up hair, protective clothing, shoes, and goggles. It advises against eating/drinking in the lab and working alone with hazardous materials. The HazMat diamond rating system is explained for assessing chemical hazard levels.

Mindmap
Keywords
💡Lab safety
Lab safety refers to taking precautions and following guidelines to prevent injury or accidents when working in a laboratory environment. The video covers various aspects of lab safety such as appropriate clothes, dealing with chemicals, use of equipment, etc. For example, it states that long hair should be tied up to avoid catching fire.
💡Personal Protective Equipment (PPE)
PPE refers to equipment worn for protection from hazards in a lab, such as goggles, gloves, lab coats, closed-toed shoes, etc. The video stresses on wearing full body covering clothes and shoes at all times as a PPE precaution in the lab.
💡Chemical spills
The video advises on safety measures when dealing with spilled chemicals. It states that for some chemicals dilution is the solution but for others it can harm the environment. Proper waste disposal procedures should be followed based on the type of chemical.
💡Fume hood
A fume hood is an equipment used to carry out experiments with noxious fumes, as it sucks out the air to avoid exposure. The video shows how to use a fume hood correctly by adjusting the sash level and turning on the vent and blower.
💡MSDS
MSDS or Material Safety Data Sheet provides information about safe handling, hazards, emergency procedures etc. for a chemical. The video states that MSDS should be referred before using any new chemical and can also provide first aid details in case of exposure.
💡HazMat diamond
The HazMat or Hazardous Materials diamond rates health hazard, flammability hazard and reactivity level of a chemical or substance for safe handling. The video explains that higher ratings indicate higher danger.
💡Pipetting
Pipetting refers to the process of transferring small precise volumes of liquids using a pipette. The video advises on proper technique like using pipette bulbs instead of mouth pipetting to avoid ingestion.
💡Waste disposal
The video emphasizes appropriate waste disposal procedures based on the type of chemical, rather than flushing everything down the drain which can harm the environment.
💡Broken glass
The video states that cuts from broken glass are a common injury and it should always be cleaned up with a broom and dustpan, not bare hands. The waste glass should go into a designated sharp object disposal bin.
💡Protective clothing
The video recommends wearing an apron for extra protection from chemical spills and as aprons are easier to remove quickly in case of large spills instead of clothing.
Highlights

Tie up long hair and avoid loose clothing to prevent fires or contamination

Always wear closed-toed shoes, long pants, sleeves, and eye protection in the lab

Don't eat, drink, or work alone in the lab to prevent accidental ingestion or injury

The HazMat diamond rates health hazards, flammability, and reactivity from 0-4

MSDS sheets provide handling guidelines and first aid for chemicals

Fume hoods ventilate noxious fumes outside to protect health

Waft chemicals toward your face instead of inhaling directly

Never pipette by mouth or taste chemicals

Pour liquids decisively to overcome surface tension

Use lubricant and grip low on glass to insert stoppers safely

Dilute common acids/bases before flushing; other chemicals need special disposal

Wear aprons to protect skin and quickly remove contaminated clothes

Eyewash stations immediately rinse eye contaminations

Running to safety showers helps dilute skin contact with hazards

Know proper disposal methods before using any chemical

Transcripts

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