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General Chemistry LaboratoryCHE116/CHE118
Safety Aspects for Lab Work to Supplement Student Laboratory
Safety Contract
CHE116/CHE118 1
Inserting Glass Into Tubing
• Glass tube into all-purpose tubing• Glass pipet into pipetter• Glass arm of filter flask into vacuum tubing• Glass thermometer into rubber stopper
CHE116/CHE118 2
Basic Technique
• Always hold the glass tubing near the end being inserted, to prevent the breakage of the glass while it is inserted into tubing.
• Wet the outside end of the glass tubing with deionized water (just a drop or two). This may make insertion into the tubing easier.
(continued on next slide)
CHE116/CHE118 3
Use a thick layer of paper towel around the glass to prevent cuts if the glass should break
CHE116/CHE118 4
Pipet and Pipetter
Pipetter
Pipet
CHE116/CHE118 5
Use proper technique to prevent cutsHold pipet near end to be inserted Insert pipet into pipetter
CHE116/CHE118 6
Filter Flask and Vacuum Tubing
CHE116/CHE118 7
Hold side arm near end Push glass arm into tubing
CHE116/CHE118 8
Thermometer and Rubber Stopper
Hold thermometer near the end to be inserted
Insert into rubber stopper(would be better with paper towel wrap)
CHE116/CHE118 9
Additional Safety NotesAcquiring Reagents
• Wear gloves and goggles
• Always dispense chemicals from stock bottles located in the fume hood. The safest place to have a chemical spill is in the fume hood.
• Only take as much chemicals as needed to perform the experiment.
• Label the receiving beaker.
• After the experiment is finished, the chemicals (reactants and products) should be disposed of in the waste bottle located in the fume hood.
CHE116/CHE118 10
Fume Hoods and Reagents
CHE116/CHE118 11
Acids
• Acids are used frequently in CHE116 and CHE118.
• Always wear gloves and goggles when handling any and all chemicals
• When combining acid and water, always add acid to water; never add water to acid
CHE116/CHE118 12
For All Laboratory Work:
• Always wear goggles and gloves during lab work. Take goggles off at the goggle cabinet.
• Take the smallest amount of reagent necessary to your lab bench (if reagent is allowed outside of hood)
• Clean up chemical spills immediately
• Notify your lab instructor if you get any chemicals on you. An incident report will be written.
CHE116/CHE118 13