CHEMISTRY LAB MANAGEMENT AND SAFETY

1. CHEMISTRY LAB MANAGEMENT AND SAFETY SHERSINGH RAJPOOT PGT CHEMISTRY KENDRIYA VIDYALAYA SPM HOSHANGABAD

2. आओ करके सीखे मैंने सुना भूल गया , मैंने देखा याद रहा ,करके देखा समझ गया ।

3. Introduction Laboratory Quality Management System-Module 1

4. LABORATORY MANAGEMENT It is mostly concerned with the provision of materials for laboratory work maintenance and repair of equipment and the proper organization of laboratory and auxiliary services The teaching laboratory may consist of the common preparation room and the dispensing store. Management involves the coordination and integration of resources to accomplish specific results.

5. A CHEMISTRY LAB MUST HAVE Sufficient number of cupboards as per plan Of the lab and number of students Teachers room For teachers to study and keep records and books well equipped with cupboard and furniture. Laboratory must receive ample day light in order to make the observation etc. of the experiments visible and to avoid any accident. Floor with non-skid tiling resist strong acid and alkali, but also resist scratch, fading, ageing and strain resistant.

6. Cont……. A demonstration self slightly higher in height attached with with easily cleanable sink and water supply. Water supply Fire extinguisher Exhaust and ventilators Interactive boards at suitable height to be easily visible by the students. Mini subject library .

7. Cont……. Gas Supply Installation of gas plant for regular supply of gas through Bunsen gas. burners on working shelves. A first aid kit with Silverexand mild antiseptic cream. LCD Projector Suitably positioned so that the projection is visible to all and easy to manage by the teacher .It should be used in removable mode to avoid effects of fumes . Distillation Plant Digital balance Einstein tablet for measurement of melting point, exact pH practical of heat, light to draw graph of observation and keeping record for future.

8. WHAT IS A PREPARATION ROOM? This refer to a room which provides space where solution and equipment can be prepared for use. The preparation room must contain the following . A sink . A source of water still or deionizer . A balance (either physical or electronic balance) . Large bench for dry works. . A towel or a piece of clothes. .Mortar and pastel . . Weighing equipments etc.

9. A DISPENSING STORE 1. This is a room where a teacher can store the material and equipment in everyday use and to provide a room where sum of the item which may be dangerous could be properly stored. 2. The material kept in the dispensing store must be arranged in a way that makes it easy to find any particular item without relying too much on memory.

10. DISPENSING STORE For the purpose of reducing inconvenience which may result from misplacement it is recommended that you have a level of the arrangement of all materials in the store. All hazardous chemical should be put in a cupboard which should always be locked except in times of need and a large label should be put on the door indicating the dangers of contaiminating those chemicals

11. STORAGE OF APPARATUS Storage of apparatus is highly linked to the climatic condition of the area concerned. . Humid, hot condition produces rapid corrosion. . Hot dry condition create the hazard of dust and send accumulation in the laboratory equipment's. . Cold condition most proffered. .

12. How to overcome the unfavorable condition for equipment storage In order to reduce hazards apparatus must be stored in a cupboard. Use a moving air current in a cupboard. cupboard must allow air movement. Drill holes about 2 cm in diameter at each end of the cupboard which are covered by fine gauze to prevent dust.

13. Windows should be covered with fine mosquito netting to keep out flying insects lizards and crawling insects.

14. STORAGE OF CHEMICALS Glassware should be stored in such a ways that each size and type clearly labelled. For safety purposes as well as to save space glass tubing should be stored vertically in a suitably constructed rack. Bottles with dangerous liquid should be carried using a plastic bucket.

15. STORAGE OF CHEMICALS • Avoid storing materials and equipment on top of cabinets • Do not store corrosive liquids above eye level. • Provide a specific storage location for each type of chemical, and return the chemicals to those locations after each use. • Avoid storing chemicals in the workspace within a laboratory hood, except for those chemicals currently in use. • If a chemical does not require a ventilated cabinet, store it inside a closable cabinet or on a shelf that has a lip to prevent containers from sliding off in the event of an accident or fire. • Do not expose chemicals to heat or direct sunlight. • Observe all precautions regarding the storage of incompatible chemicals. • Use corrosion resistant storage trays or secondary containers to collect materials if the primary container breaks or leaks

16. STORAGE OF CHEMICALS Store chemicals in alphabetical order in such a way that they are not reactive to each other. if they react than kept at different place. Keep liquid and solid chemicals at different places. While arranging chemicals in a reagent bottles always assign unique no. to a reagent which is present in each rack. Ex. Conc. Sulphuric acid 1 no.

17. KEEPING LAB FUNCTIONAL The equipment must be maintained functional and necessary repair work whenever needed must be carried out periodically Fire Extinguisher Must be refilled time to time and pressure gauge should be checked periodically Gas Maintenance Gas pipes,Gas burners and Gas taps should be checked for any gas leakage and non functionality of burners.

18. Cont…… Stock Verification Must be done regularly at year end to have check on articles. Condemnation Non functional equipment due to regular wear and tear or time should be condemned yearly. Procurement The equipment condemned or needed as per changes in syllabi must be procured immediately. Glassware must be of borosil quality and chemicals make should be of Glaxo/qualigen/merck

19. SAFETY IN LABORATORY Safety is the most important concern in a chemistry class.  Safety rules will be enforced strictly! Teacher should not allow Students to work alone in a laboratory Teacher should not allow students When first entering a science laboratory or room to touch any equipment, chemicals, or other materials until instructed to do so. Students will perform experiments under monitoring of teacher.

20. Introduction Laboratory Quality Management System-Module 1

21. SAFETY Work areas will be kept clean and tidy at all times. Monitor Students will bring only those items that they have been instructed to bring to the laboratory work area. Students will always work in a well-ventilated area.   Students will be alert and proceed with caution at all times in the laboratory Students will never leave an experiment while it is in progress

22. SAFE WORK PRACTICES

23. Be Aware of Your Surroundings

24. Know the potential hazards and appropriate safety precautions before beginning work. Ask and be able to answer the following questions: • What are the hazards? • What are the worst things that could happen? • What do I need to do to be prepared? • What work practices, facilities or personal protective equipment are needed to minimize the risk?

26. Personal Protective Equipment (PPE)

27. Eye Protection

28. Gloves

29. Clothing

30. When Chemical Exposure Occurs Seconds Count!

31. Chemicals on Skin or Clothing • Immediately flush with water for no less than 15 minutes. • For larger spills, the safety shower should be used. • While rinsing, quickly remove all contaminated clothing or jewelry. Seconds count. Do not waste time because of modesty. • Use caution when removing pullover shirts or sweaters to prevent contamination of the eyes. • Discard contaminated clothing or launder them separately from other clothing. Leather garments or accessories cannot be decontaminated and should be discarded. • Do not use solvents to wash skin. They remove the natural protective oils from the skin and can cause irritation and inflammation. In some cases, washing with a solvent may facilitate absorption of a toxic chemical. • For flammable solids on skin, first brush off as much of the solid as possible, then proceed as described above. • Fill out an Incident Report!

32. Chemicals in Eyes • Immediately flush eye(s) with water for at least fifteen minutes. The eyes must be forcibly held open to wash, and the eyeballs must be rotated so all surface area is rinsed. The use of an eye wash fountain is desirable so hands are free to hold the eyes open. If an eyewash is not available, pour water on the eye, rinsing from the nose outward to avoid contamination of the unaffected eye. • Remove contact lenses while rinsing. Do not lose time removing contact lenses before rinsing. Do not attempt to rinse and reinsert contact lenses. • Seek medical attention regardless of the severity or apparent lack of severity. Explain carefully what chemicals were involved. If easily accessible, bring an SDS. • Fill out an Incident Report!

33. Chemical Inhalation • Close containers, open windows or otherwise increase ventilation, and move to fresh air. • If symptoms, such as headaches, nose or throat irritation, dizziness, or drowsiness persist, seek medical attention. Explain carefully what chemicals were involved. Accidental Injection of Chemicals • Wash the area with soap and water and seek medical attention, if necessary.

34. Arrive in lab with long pants and closed-toe shoes and bear goggles

35. Never eat or drink in the lab. Bear gloves.

36. Proper way of heating.

37. Following Proper Safety Protocol

38. Practicals and theory interlinking Volumetric analysis :- xii explain preparation of solution with different conc. Molarity/molality/normality xi moles in solution Explain lyophilic and lyophobic colloidal solution by preparation of starch and ferric hydroxide sol.(surface chemistry) Explain distinguish between coloured pair by test of functional group.alcohol/phenol/aldehyde/ ketone it make learning easy

39. Explain factor affecting rate of reaction (conc./temp.) by reaction between sodium thiosulphate and hydrochloric acid. Prepare double salt ferrous ammonium sulphate (Mohr’s salt) and explain properties of double and complex salt./also explain crystalisation of salt by it (XI purification) In qualitative analysis explain brown ring test of nitrate (page no.175 ncert text)

40. In test of iron(3rdgp) and explain reaction of page no 171 ncert text.(iron with ammonium hydroxide) Explain concept of common ion effect and ionic and solubility product /common ion effect by qualitative analysis. Explain pH class Xi equilibrium by calculating pH of different substance. Explain qualitative analysis class xi by lassigne’s test. (S, N, Cl , S)