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1.0  Introduction

2.0  Objective

3.0  Main Content

 3.1  Safety Regulations  

 3.2  Laboratory regulations

4.0  Conclusion

5.0  Summary

6.0  Tutor Marked Assignments

7.0  References/Further Reading

 

 

 

1.0  Introduction

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While working in the science laboratory, you will have certain important responsibilities that do not apply to other classrooms. You will be working with materials and apparatus which, if handled carelessly or improperly, have the potential to cause injury or discomfort to someone else as well as yourself.

A science laboratory can be a safe place in which to work if you, the student, are foresighted, alert, and cautious.

 

2.0  Objective  

At the end of this unit you should be able :

  • To mention some of the safety precautions and laboratory regulations necessary during your experiments in the laboratory.
  • Put the safety regulations to use during practical session

 

 

3.0  Main Content

3.1 Safety Regulations

The following practices will be followed:

  1. Report any accident to the teacher immediately, no matter how minor, including reporting any burn, scratch, cut, or corrosive liquid on skin or clothing.
  2. Prepare for each laboratory activity by reading all instructions. Follow all directions implicitly and intelligently. Make note of any modification in procedure given by the instructor.
  3. Any science project or individually planned experiment must be approved by the teacher.
  4. Use only those materials and equipment authorized by the instructor.
  5. Inform the teacher immediately of any equipment not working properly.
  6. Clean up any nonhazardous spill on the floor or work space immediately.
  7. Wear appropriate eye protection, as directed by the instructor, whenever you are working in the laboratory. Safety goggles must be worn during hazardous activities involving caustic/corrosive chemicals, heating of liquids, and other activities that may injure the eyes.
  8. Splashes and fumes from hazardous chemicals present a special danger to wearers of contact lenses. Therefore, students should preferably wear regular glasses inside splash-proof goggles during all lab activities where exposure to chemicals or chemical fumes is possible.
  9. Students with open skin wounds on hands must wear gloves or be excused from the laboratory activity.
  10. Never carry hot equipment or dangerous chemicals through a group of students.
  11. Check labels and equipment instructions carefully. Be sure correct items are used in the proper manner.
  12. Never taste anything or touch chemicals with the hands, unless specifically instructed to do so.
  13. Test for odor of chemicals only by waving your hand above the container and sniffing cautiously from a distance.
  14. Eating or drinking in the laboratory or from laboratory equipment is not permitted.
  15. Use a mechanical pipette filler (never the mouth) when measuring or transferring small quantities of liquid with a pipette.
  16. When heating material in a test tube, do not look into the tube or point it in the direction of any person during the process.
  17. Never pour reagents back into bottles, exchange stoppers of bottles, or lay stoppers on the table.
  18. When diluting acids, always pour acids into water, never the reverse. Combine the liquids slowly while stirring to distribute heat buildup throughout the mixture.
  19. Keep hands away from face, eyes, and clothes while using solutions, specimens, equipment, or materials in the laboratory. Wash hands as necessary and wash thoroughly at the conclusion of the laboratory period.
  20. Report any accident to the teacher immediately, no matter how minor, including reporting any burn, scratch, cut, or corrosive liquid on skin or clothing.
  21. Prepare for each laboratory activity by reading all instructions. Follow all directions implicitly and intelligently. Make note of any modification in procedure given by the instructor.
  22. Any science project or individually planned experiment must be approved by the teacher.
  23. Use only those materials and equipment authorized by the instructor.
  24. Inform the teacher immediately of any equipment not working properly.
  25. Clean up any nonhazardous spill on the floor or work space immediately.
  26. Wear appropriate eye protection, as directed by the instructor, whenever you are working in the laboratory. Safety goggles must be worn during hazardous activities involving caustic/corrosive chemicals, heating of liquids, and other activities that may injure the eyes.
  27. Splashes and fumes from hazardous chemicals present a special danger to wearers of contact lenses. Therefore, students should preferably wear regular glasses inside splash-proof goggles during all lab activities where exposure
  28. Students with open skin wounds on hands must wear gloves or be excused from the laboratory activity.
  29. Never carry hot equipment or dangerous chemicals through a group of students.
  30. Check labels and equipment instructions carefully. Be sure correct items are used in the proper manner.
  31. Never taste anything or touch chemicals with the hands, unless specifically instructed to do so.
  32. Test for odor of chemicals only by waving your hand above the container and sniffing cautiously from a distance.
  33. Eating or drinking in the laboratory or from laboratory equipment is not permitted.
  34. Use a mechanical pipette filler (never the mouth) when measuring or transferring small quantities of liquid with a pipette.
  35. When heating material in a test tube, do not look into the tube or point it in the direction of any person during the process.
  36. Never pour reagents back into bottles, exchange stoppers of bottles, or lay stoppers on the table.
  37. When diluting acids, always pour acids into water, never the reverse. Combine the liquids slowly while stirring to distribute heat buildup throughout the mixture.
  38. Keep hands away from face, eyes, and clothes while using solutions, specimens, equipment, or materials in the laboratory. Wash hands as necessary and wash thoroughly at the conclusion of the laboratory period.
  39. Dress appropriately as per the requirement of the laboratory. Avoid wearing bulky or loose fitting clothes or dangling jewelry. Wearing laboratory coat in the lab is a must.
  40. Never work alone in the lab/ workshop. In case of working alone, make sure that someone knows where you are and what you are doing.
  41. Never run or play in the laboratory. No food or drink should be consumed in the laboratory and workshop.
  42. Never taste any chemical or solvent and pipette out by mouth. Never smell gases directly. 43. Wear gloves when using any hazardous or toxic material. Wear safety goggles when working with flames, heated liquids or glassware.
  43. Do not use any equipment unless you are trained and permitted.
  44. When working with electric circuits, be sure that the current is turned off before making adjustments in the circuit. Avoid using of extension cords whenever possible. Never ever use, modify, attach or otherwise change any high voltage equipment without consulting the concerned in charge.
  45. Do not leave any ongoing experiment unattended.
  46. Know the locations of fire extinguishers, fire blankets in the laboratory.

 

 

 

 

 

 

3.2. Laboratory regulations

You must have a lab Notebook and bring it to the lab every time you have to be in the lab. You should keep a good notebook with all the calculations and the results because your instructor will grade your Lab notebooks at the end of the each experiment. Finally, each member of your group has to write a 5 or 6 page lab report after completing the experiment. This is going to be an individual report therefore, even if your results are the same. The reports you write must be your own work. If your instructor finds out that your report is exactly the same with another member of your group, you will not receive any credit for that report and he/she may consider it as cheating.

Attendance is required and you are expected to attend all scheduled laboratory sessions. If you miss more than two-lab session without a valid reason you will be automatically dropped from lab. . Remember this is a group work and if you cannot be there inform other members of your group. Please be also on time since your group members will depend on you to start the experiments.

Format of the Lab Report

You should prepare your lab reports by handwriting. They should include tables and illustrations where necessary. Typically, a lab report should contain the following sections: title page, introduction, experimental section, results and discussion, and references.

Your title page should be a separate page including the title of the project which might simply be the name of the experiment, your name, name of the course and the date the report

Laboratory Care and Waste Disposal

Remember that the equipment you use in this laboratory will be used by many other students. Please leave the equipment and all workspaces as you wish to find them. After the end of the each lab, clean off your work area. Wash your glassware. When weighing any material on the balances, do not weigh directly onto the balance pan. Weigh your material on a piece of weighing paper. The balances are very sensitive instruments and should be treated with great care.

If you take more reagents than you need, do not put excess back into the bottle. It may be contaminated. Threat it as waste and dispose of it accordingly. It is most likely that, during any experiment you will perform, you will generate some waste chemicals and solutions to dispose of. Never put them down the sink unless specifically told to do so by your instructor. There will be inorganic, organic, and solid waste containers in the lab. Dispose of your waste in appropriate container.

 

 

 

4.0  Conclusion

In this unit you have learnt the safety precautions and laboratory regulations you will need for your work through this course.

 

 

5.0  Summary

The chemistry laboratory is not a dangerous place to work as long as all necessary precautions are taken seriously. Everyone who works and performs experiments in a laboratory must follow these safety rules at all times. It is the student’s responsibility to read carefully all the safety rules before the first meeting of the laboratory.

 

 

 

6.0  Tutor Marked Assignment

  1. What is the reason for prohibiting ALL food, drink, and smoking materials in the labs?
  2. What clothing is appropriate for Chemistry lab workers?
  3. When you finish working with chemicals, biological specimens, and other lab substances, always A. treat your hands with skin lotion. B. wash your hands thoroughly with soap and water. C. wipe your hands on a towel. D. wipe your hands on your clothes.?
  4. If an acid is splashed on your skin, wash at once with A. soap. B. oil. C. weak base. D. plenty of water.

 

  1. If a piece of equipment is not working properly, stop,turn it off, and tell A. the custodian. B. your lab partner. C. your best friend in the class.

D. the science instructor.

 

6. After completing an experiment, all chemical wastes should be

A. left at your lab station for the next class. B. disposed of according to your instructor’s directions. C. dumped in the sink. D. taken home.

 

 

 

 



 




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EcoleBooks | UNIT 1  - LABORATORY REGULATIONS  - INORGANIC CHEMISTRY PRACTICALS

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