Chemistry1 Laboratory Procedures

Chemistry2 Fume Hood Located between lab and prep room Prevents harmful fumes from entering lab May be used for demonstrations Often used by teacher when diluting or disposing of chemicals Open to outside at all times, fan can be turned on for more airflow

Chemistry3 Spill Control If you spill on yourself, rinse with water immediately! If you spill on the lab bench or the floor, dilute with water if practical before cleaning up. Then use one of the following spill control products, all located under the goggle cabinet

Chemistry4 Spill Control Spill control pillows: Use for any spill Place pillow on spill and wipe as needed Sand Use for any spill Mainly for containment – keeps spill from spreading

Chemistry5 Spill Control Absorbent material Use for any spill Very absorbent Especially useful for flammable liquids Ethanol, acetone, etc. Acid neutralizer Use for acid spills It may foam

Chemistry6 Safety Shower Located next to fume hood Used for chemical spills over large areas of the body. To use: Stand under shower Remove effected clothing Pull down on handle Push up on bar to shut off

Chemistry7 Eye Wash Station Located under safety shower Used for chemicals splashed in eyes To use: Push lever to turn on Put eyes in path of spray Hold eyes open Remove contact lenses Stay for 10 minutes

Chemistry8 Fire extinguishers Located by lab door Pull hard on door to open To use, remember PASS Pull pin out Aim at base of fire Squeeze trigger Sweep from side to side

Chemistry9 Fire blanket Located near fire extinguisher Use to cover a person who is on fire If you are on fire, Stop, drop, and roll Someone will get the fire blanket and help you

Chemistry10 Fire alarm Located in hallway Use if there is a large or uncontrolled fire Pull alarm and exit the building

Chemistry11 Gas Shut Off Located near prep room Used to turn off gas to entire lab Turn handle so it is perpendicular to pipe to shut gas off

Chemistry12 Lab attire Goggles and aprons are designed to protect you from chemical spills – wear them Take care to keep your hair and clothing away from chemicals and bunsen burners Be careful with open-toed shoes and shorts or short skirts

Chemistry13 Use common sense When in lab, pay attention to what you are doing Watch where you are going Don’t push, shove, pinch, startle, or sneak up on anyone Don’t crowd around chemical or weighing stations – everyone will get a turn

Chemistry14 Test tubes Available in many sizes Used for many tasks, including mixing and heating of substances

Chemistry15 Test tube brush Used to clean test tubes Different sizes are available – ask if you need a different one

Chemistry16 Test tube holder Used to hold test tubes in your hand while heating them

Chemistry17 Utility clamp Used to hold test tubes or flasks attached to a ring stand

Chemistry18 Test tube rack Sets on table Used to hold test tubes during an experiment

Chemistry19 Ring stands and rings Variety of uses Often used to support test tubes, beakers, or flasks being heated by a bunsen burner

Chemistry20 Graduated cylinders Available in different sizes Use the smallest one that will meet your needs for the best accuracy If measuring a large amount you may need to refill as you measure

Chemistry21 Beakers Used to hold chemicals May be used for mixing or heating Only used to measure approximate volumes

Chemistry22 Erlenmeyer flasks Used to hold, mix, and heat chemicals To mix, hold by the neck and swirl

Chemistry23 Florence flasks Used to hold, mix, and heat chemicals To mix, hold by the neck and swirl

Chemistry24 Beaker tongs Used to move hot beakers

Chemistry25 Forceps tweezers

Chemistry26 Squares Wire mesh and ceramic Used to support beakers and flasks being heated with a bunsen burner

Chemistry27 Scoopula Used to scoop dry materials out of their bottles

Chemistry28 Evaporating dish Used for heating

Chemistry29 Watch glasses Curved circular pieces of glass Often used to cover evaporating dishes while heating

Chemistry30 Collecting bottles Variety of uses Often used to collect displaced gases

Chemistry31 Crucible Used for heating Has a lid

Chemistry32 Clay triangle Used to support crucibles being heated by a Bunsen burner

Chemistry33 Crucible tongs Used to move hot crucibles or crucible lids

Chemistry34 Pneumatic trough Used to hold large quantities of liquids (usually water) Has an overflow prevention spout: make sure this is over the sink

Chemistry35 Wash bottle Squeeze bottle Often used for cleaning Never touch the tip of a wash bottle to anything. After you stop squeezing, the bottle sucks in air. If there is a chemical on the tip of the bottle, it will suck that in too.

Chemistry36 Hot glassware Looks the same as cool glassware If you drop hot glassware, don’t catch it with your hands!! I would rather clean up broken glass than treat you for burns

Chemistry37 Broken glassware Sweep the pieces up with the broom Put them in the glass disposal box

Chemistry38 Measuring solids Use a balance Place your weighing paper or other container on the balance. Push the ZERO button. Make sure the balance reads zero before you start putting the material on it.

Chemistry39 Measuring solids Add a little at a time so you don’t go over the needed amount. If you get too much, don’t put it back in the bottle. Give it to someone else who needs it Or put it in the trash or waste beaker

Chemistry40 Measuring liquids Unless the directions say approximately, measure with a graduated cylinder. Use the smallest graduated cylinder that will get the job done – this will be the most accurate.

Chemistry41 Measuring liquids Read the graduated cylinder at eye level. Don’t hold it up to your eyes. Bring your eyes down to its level by squatting or bending over.

Chemistry42 Measuring liquids Pour slowly so you don’t get too much Be extra careful if you are using a funnel If you get too much, don’t pour it back in the bottle. Give it to someone else who needs it Or pour it down the drain with lots of water Or put it in the waste beaker

Chemistry43 The meniscus Measure to the bottom of the meniscus

Chemistry44 Using droppers Like wash bottles, make sure the dropper tip doesn’t touch anything. After you stop squeezing, the dropper sucks in air. If there is a chemical on the tip of the dropper, it will suck that in too.

Chemistry45 Cleaning labware Squeeze in some soap (only if really dirty) Use a test tube brush if needed Ask for another brush if needed Rinse at least three times with tap water (or until all soap is gone) Rinse once with distilled water Put on drying rack or in other designated location.