Laboratory safety is a fundamental component of scientific practice and a prerequisite for all experimental work. A laboratory environment contains a wide range of potential hazards, including open flames, hot surfaces, electrical equipment, chemical substances, and fragile glassware. Without proper knowledge and discipline, these hazards can lead to accidents, injuries, or damage to equipment.
This laboratory activity is designed as a comprehensive introduction to laboratory safety procedures, emergency preparedness, and responsible scientific conduct. Unlike traditional experiments that focus on data collection or analysis, this lab emphasizes awareness, prevention, and correct responses to potentially dangerous situations.
Students will become familiar with personal protective equipment, laboratory rules, and emergency devices while observing the effects of heat sources such as Bunsen burners and hot plates. By developing good safety habits early, students will be better prepared to perform future laboratory experiments confidently and responsibly.
The skills acquired during this activity are transferable to all scientific disciplines and mirror professional standards used in academic, industrial, and research laboratories.
Educational Goals
By the end of this laboratory, students will be able to
- Correctly identify and use personal protective equipment appropriate to laboratory tasks.
- Locate emergency safety equipment and explain its purpose.
- Demonstrate safe behavior when working with heat sources.
- Understand laboratory rules and explain why they are necessary.
- Develop responsibility, attentiveness, and discipline in a laboratory environment.
- Apply safety principles consistently across different experimental contexts.
Protocol
Wear the protective equipment appropriate to the task
- Locate and put on the lab coat.
- Locate and put on the safety goggles.
- Locate and put on the nitrile gloves.
Using the laser pointer, point to the location of the following safety equipment
- Locate the first aid kit.
- Locate the fire extinguisher.
- Locate the emergency shower and the eyewash station.
- Locate the fire alarm.
- Locate the smoke and carbon monoxide detector.
Effect of a heat source: Bunsen burner
- Remove the nitrile gloves.
- Locate and put on the thermal protective gloves.
- Light the Bunsen burner using the red button at the base of the tube.
- Quickly pass one hand above the flame (make sure to wear the thermal gloves!).
- Turn off the burner.
Effect of a heat Source: Hot plate
- Set the hot plate temperature to 100°C. Wait until the temperature is reached.
- Quickly pass one hand above the hot plate (make sure to wear the thermal gloves!).
- Lower the hot plate temperature to 15°C.
Additional information
- It is also important to tie back your hair, remove your jewelry (rings, bracelets, etc.) and wear closed toe shoes.
- Clear the lab benches and aisles of any obstruction (a backpack, for example).
- Wash your hands when entering and leaving the laboratory.
- Read and follow the labeling of the products used.
- Ask for clarification if you are uncertain about a procedure to perform or a product to use.
- Do not eat, drink or chew gum in the laboratory.
- Behave calmly, handle equipment carefully and pay attention to your work.
- Avoid handling a flammable product next to a hot spot.
- Perform only the procedures prescribed by the teacher, the teacher, the technician or the laboratory technician.
- Do not taste or smell any substance.
- Do not pour toxic chemical or biological products into the sinks.
- Never take equipment or substances out of the laboratory.
- Immediately report any breakage, spill or injury to the person responsible for the laboratory.
- Clean the equipment and the workspace after the experiments.
Anticipated Outcomes
Students are expected to demonstrate consistent use of protective equipment and correct laboratory behavior. All safety devices should be correctly identified and their functions understood.
During flame exposure, students recognize the dangers associated with open flames and the necessity of thermal protection. When working with hot plates, students observe that heat sources can remain dangerous even without visible indicators.
Overall, students should conclude that laboratory safety depends on preparation, awareness, and adherence to established procedures rather than on assumptions about risk.
Summary of Assignment by Grade Range
Grade 9–10 (Introductory Level)
- Students focus on developing basic laboratory awareness and safety habits.
- The emphasis is on recognizing hazards, following instructions, and understanding the purpose of protective equipment.
Grade 11 (Intermediate Level)
- Students are expected to apply safety procedures more independently and justify safety-related decisions.
- They analyze risks associated with laboratory equipment and explain how safety measures reduce potential hazards.
Grade 12 (Advanced / Pre-University Level)
- Students critically evaluate laboratory safety as a form of risk management.
- They assess procedures, identify sources of danger, and propose improvements aligned with professional laboratory standards.
Laboratory essentials
Instruments
- Laser pointer
- Bunsen burner
- 50 mL Beaker
- Hotplate
- Digital thermometer
- Spatulas
- Tweezers
Products
- Potassium iodide (powder)