Jove Lab Chem
Proper Lab Notebook Keeping — Lab Prep
Source: Lara Al Hariri at the University of Massachusetts Amherst, MA, USA
- Preparation of the Laboratory
Here, we show the laboratory preparation for 10 students working in pairs, with some excess. Please adjust quantities as needed.
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Put on a lab coat, splash-proof safety glasses, and nitrile gloves. You'll work in a fume hood because these acids are toxic and corrosive.
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Ensure that the lab has containers for concentrated acid waste, aqueous acid waste, and glass waste.
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Prepare a bottle of concentrated sulfuric acid for each student group. Measure 10 mL of 98% w/w sulfuric acid with a graduated cylinder and pour it into 20-mL bottles using a funnel. Tightly cap the bottles and label them with the solution name and concentration.
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Prepare a bottle of nitric acid for each student group. Measure 10 mL of 70% w/w nitric acid with a clean graduated cylinder and pour it into 20-mL bottles via a clean funnel. Cap the bottles and label them with the name and concentration.
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Set one bottle of nitric acid and one bottle of sulfuric acid at each hood.
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Place a bottle of methyl benzoate in a common hood.
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Put Pasteur pipettes and circular filter papers on a central bench.
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Confirm that the balance area has enough weighing boats, spatulas, and lab wipes for the class.
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Set out the following glassware and equipment at each student lab station (we suggest that students work in pairs):
2 Lab stands 3 Small 2-prong clamps 2 100-mL beakers 1 250-mL beaker 1 400-mL beaker 1 600-mL beaker 3 10-mL graduated cylinder 1 50-mL graduated cylinder 1 25-mL Erlenmeyer flask 1 250-mL filter flask 1 20-mL test tube 1 Glass stirring rod 1 Large Büchner funnel 1 Rubber filter adapter 1 Thermometer 2 Pipette bulbs 1 Roll of lab tape 1 Marker/pen 3 Small beakers
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