Batangas State University Chemistry SciET 141 Laboratory Safety Lecture Notes PDF

SciET 141 CHEMISTRY  Unit 1 Introduction, Lab Safety, and Waste Management A. Laboratory Safety Policies, Safety Data Sheet Waste Management B. Common Laboratory Glassware and Materials 2 ©2017 Batangas State University  IDENTIFY THE LABORATORY APPARATUS....

SciET 141 CHEMISTRY  Unit 1 Introduction, Lab Safety, and Waste Management A. Laboratory Safety Policies, Safety Data Sheet Waste Management B. Common Laboratory Glassware and Materials 2 ©2017 Batangas State University  IDENTIFY THE LABORATORY APPARATUS. ► ERLENMEYER FLASK 3  IDENTIFY THE LABORATORY APPARATUS. ► MORTAR & PESTLE 4  IDENTIFY THE LABORATORY APPARATUS. ► BUNSEN BURNER 5  IDENTIFY THE LABORATORY APPARATUS. ► BEAKER 6  IDENTIFY THE LABORATORY APPARATUS. ► Graduated Cylinder 7  IDENTIFY THE LABORATORY APPARATUS. ► WATCH GLASS 8  IDENTIFY THE LABORATORY APPARATUS. ► EVAPORATING DISH 9  IDENTIFY THE LABORATORY APPARATUS. ► BURETTE 10  IDENTIFY THE LABORATORY APPARATUS. ► PIPETTE 11  IDENTIFY THE LABORATORY APPARATUS. ► FLORENCE FLASK 12  IDENTIFY THE LABORATORY APPARATUS. ► CRUCIBLE 13  IDENTIFY THE LABORATORY APPARATUS. ► TONGS 14  LABORATORY 15  BatStateU LABORATORY (located in CEAFA bldg.) 16  COMMON LABORATORY GLASSWARE Glassware used in all chemistry courses: 17 ©2017 Batangas State University Engr. Airra Mhae Ilagan  COMMON LABORATORY GLASSWARE Glassware Use Graduated Cylinder Measures the volume of liquid Wash bottle Rinses various pieces of laboratory glassware, such as test tubes and round bottom flasks Side arm flask or vacuum Filters solutions or removes solvent under reduced flask pressure Erlenmeyer flask (also Contain liquids and for mixing, heating, cooling, known as conical flask incubation, filtration, storage, and other and titration flask liquid-handling processes. 18  Graduated Cylinder A graduated cylinder, also known as a measuring cylinder or mixing cylinder, is a common piece of laboratory equipment used to measure the volume of a liquid. It has a narrow cylindrical shape. Each marked line on the graduated cylinder represents the amount of liquid that has been measured. For accuracy the volume on graduated cylinders is depicted on scales with 3 significant digits: 100mL cylinders have 1ml grading divisions while 10mL cylinders have 0.1 mL grading divisions. 19  Erlenmeyer Flask The slanted sides and narrow neck of this flask allow the contents of the flask to be mixed by swirling, without risk of spillage, making them suitable for titrations by placing it under the buret and adding solvent and the indicator in the Erlenmeyer flask. Such features similarly make the flask suitable for boiling liquids. Hot vapour condenses on the upper section of the Erlenmeyer flask, reducing solvent loss. Erlenmeyer flasks' narrow necks can also support filter funnels. 20  COMMON LABORATORY GLASSWARE 21  COMMON LABORATORY GLASSWARE Glassware Use Beaker Container to hold liquid or solid samples Funnel Guides liquid or powder into a small opening Test tube Used to handle chemical. Convenient container for heating small amounts of liquids or solids. Watch glass A surface to evaporate a liquid or heat solids Hold solids while being weighed Cover for a beaker 22  Beaker ► Beakers are often graduated, that is, marked on the side with lines indicating the volume contained. For instance, a 250 mL beaker might be marked with lines to indicate 50, 100, 150, 200, and 250 mL of volume. These marks are not intended for obtaining a precise measurement of volume (a graduated cylinder or a volumetric flask would be a more appropriate instrument for such a task), but rather an estimation. Most beakers are accurate to within ~10%. 23  COMMON LABORATORY GLASSWARE Glassware used in all chemistry courses: Drying crystal solids using a watch glass and passing a stream of dry air from an inverted funnel 24  COMMON LABORATORY GLASSWARE Test tubes are the perfect shape and size to hold small amounts of substances A watch glass is a round, concave glass dish used for evaporation in chemistry. It can also be employed for weighing solids and as a lid for flasks and beakers. An evaporating dish is a tool used in labs to separate liquids and solids from a solution by allowing the water to evaporate off into the air. 25  COMMON LABORATORY GLASSWARE Glassware used for conducting reactions and purifications: 26 ©2017 Batangas State University Engr. Airra Mhae Ilagan  COMMON LABORATORY GLASSWARE Glassware used for conducting reactions and purifications: Glassware Use Cork Ring Hold round bottom flasks, beakers and other glass containers snuggly to ensure against breakage. Fractionating column Essential item used in the distillation of liquid mixtures to separate the mixture into its component parts, or fractions, based on the differences in volatilities. West Condenser Cools vapors and condensing them back to liquid droplets that flow down the condenser into the receiver flask. 27  COMMON LABORATORY GLASSWARE Glassware Use Separatory funnel Used in liquid-liquid extractions to separate the components of a mixture into two immiscible solvent phases of different densities Stopper Prevents the spillage of liquid in the separatory funnel when shaking. Round bottom flask Specifically shaped for uniform heat distribution, Used for distillation, chemical reactions, heating liquid sample, and storage demands. Three-way adapter Aids in distillation. 28  COMMON LABORATORY GLASSWARE Glassware used for conducting reactions and purifications: Glassware Use Claisen adapter Used in situations which require more than one outlet from a round-bottom flask. Vacuum adapter Connects to the lower end of the condenser and serves to direct the distilled liquid into the receiving flask. Thermometer Maintains vacuum on the glassware adapter system while monitoring the temperature Plastic clip (Keck Prevents joints from separating. clip) Rubber fitting for Allows thermometer to fit snuggly into the 29thermometer adapter adapter to maintain vacuum.  COMMON LABORATORY GLASSWARE Fun Fact: Female joint - designed to hold a thermometer adapter Side male joint - used to connect a distillation condenser Bottom male joint – used to connect a distillation flask(round bottom flask) 30  COMMON LABORATORY GLASSWARE Glassware used for conducting reactions and purifications: 31  FLAMES & FURNACES ►Bunsen Burner & Crucibles 32  OTHER LABORATORY EQUIPMENT ►Laboratory Fumehood 33  OTHER LABORATORY EQUIPMENT ►Drying Ovens 34  OTHER LABORATORY EQUIPMENT ►Balances 35  LABORATORY SAFETY 1. Dress appropriately ✔ Wear a laboratory gown or coat to protect your clothing and minimize skin exposure. ✔ Shoes should completely cover the feet area. ✔ Long hair should be tied back. ✔ Wear protective goggles or glasses at all times in the Laboratory. 2. Keep your working area clean and organized. 36  LABORATORY SAFETY 3. For chemical reagents (solids and liquids): Keep them in the assigned dispensing area. Use laboratory instrument (test tube, beaker, etc.) when transferring reagents. Check the name on the reagent before using them. Label every instrument where chemicals are transferred. Avoid contaminating the reagents. Never return unused chemicals to the reagent bottles. 37  LABORATORY SAFETY 4. Keep the balance and weighing area clean. Use weighing papers for the solid reagents. Never weigh hot objects. 38  LABORATORY SAFETY 5. Dispose waste properly. THINK first before putting anything into the trash or sink. Always ASK if you are not sure how to properly dispose your waste. 39  LABORATORY SAFETY Sharps Container Broken Glass Box 40  LABORATORY SAFETY 5. Avoid direct contact with chemical Wash your hands immediately anytime you get chemicals on them and after every laboratory activities. Clean immediately all spillage before it dries up or goes into your skin and things. Never use your mouth when using a pipet. Never eat or drink in the laboratory. Do not look directly into the open end of a test tube while a reaction is being conducted. 41  LABORATORY SAFETY Spillage Cleanup Kit 42  LABORATORY SAFETY 5. Avoid direct contact with chemical To determine the odor of any chemicals, do not inhale the fumes directly. Waft vapors with your hand toward your nose. Use the fume hood for all irritating and toxic vapors. 43  LABORATORY SAFETY 6. Handle glassware with precaution. When heating with Bunsen burner, use ONLY beakers, Erlenmeyer flask, or test tubes. Do not hold a test tube in your hands during a chemical reaction. Do not touch glass that has been near a flame. Never use a thermometer as a stirrer. 44  LABORATORY SAFETY 7. Learn the location and proper use of safety equipment. 45  LABORATORY SAFETY Fire Extinguishers 46  LABORATORY SAFETY Emergency Eye Wash and Face Wash Stations 47  LABORATORY SAFETY 8. Be aware of the Material Science Data Sheet (MSDS). MSDS – is a document that provides workers with procedures for safely handling or working with a particular substance. It includes: technical information of the chemical, necessary protective equipment, how to handle spills, first aid suggestions, storage and disposal, and the general health effects. 48  LABORATORY SAFETY 9. Never work alone in the laboratory area. 10. Report all accidents to your instructor no matter how small it may seem. 11. DO NOT perform unauthorized experiments. 12. DO NOT enter the laboratory without supervision. 49  LABORATORY SAFETY 50  LABORATORY SAFETY 51  LABORATORY SAFETY SIGNAGES 52  LABORATORY SAFETY SIGNAGES General Warning 53  LABORATORY SAFETY SIGNAGES TOXIC MATERIAL 54  LABORATORY SAFETY SIGNAGES HIGH VOLTAGE 55  LABORATORY SAFETY SIGNAGES CORROSIVE 56  LABORATORY SAFETY SIGNAGES HOT SURFACE 57  LABORATORY SAFETY SIGNAGES FOOD PROHIBITED 58  LABORATORY SAFETY SIGNAGES FIRE HOSE 59  LABORATORY SAFETY SIGNAGES 60  LABORATORY SAFETY SIGNAGES 61  LABORATORY SAFETY SIGNAGES 62  LABORATORY SAFETY SIGNAGES 63  SUPPLEMENTARY NOTES Check Activity No. 1 uploaded on the google classroom. To be submitted on our face-to-face class Watch the video on the Chemical Laboratory by Rebelen Cabello https://www.youtube.com/watch?v=9Ni5UOGp0hk&feature=youtu.be 64  Remember! SAFETY FIRST! 65 ©2017 Batangas State University