Materials
- Student tray containing the following:
- 1-200 mL volumetric flask
- 1-10 mL graduated cylinder
- 1-25 mL graduated cylinder
- 2-50 mL Erlenmeyer flasks
- 1-250 mL Erlenmeyer flasks
- 1-400 mL beaker (labeled “Waste”)
- 1-50 mL buret
- Mortar and pestle
- KHP (~ 0.8 grams needed per group)
- 2.5M NaOH (~10 mL needed per group) o 0.1M HCl (50 ml needed per group)
- Phenolphthalein indicator
- Antacid
- Funnel
- In the red tray at each station.
- DI water bottle
- Supply beaker with disposable items: pipets, scoopula, small weigh boat, parafilm. o Container of glassware soap and a brush in a beaker labeled “Waste.”
- Student balance
Safety and Notes
It is important to follow the safety guidelines below while performing this lab.
- Goggles must be worn whenever any lab group is using chemicals
- Always review MSDS (Safety Data Sheet) information for all chemicals you will be working withbefore coming to class.
- Sodium hydroxide is caustic. If it gets on your skin, flush with copious amounts of water andinform your instructor.
- HCl is a strong acid. If you get any on your skin flush the area immediately with water andinform your instructor.
- Take care when heating the solution that it does not splatter or boil. Allow the solution to coolon a hot pad or other appropriate surface. NEVER put hot glassware on a cold counter.
- Use appropriate equipment to handle acids, bases, and hot glassware.
- Make sure you properly label (chemical name, concentration, date prepared & initials ofpreparer) all prepared solutions with labeling tape and sharpie even if you will be disposing of solutions.
- All liquid waste must be disposed of in the CHM 112 waste container in the back hood. Usedpipettes and weigh boats can be thrown in the trash.
- Return all materials to trays and drawers in a clean orderly condition for the next class.