Chem Tech Data and Postlab.docx

Chem Tech Data and Postlab.docx - Data Sheet 11 pts...

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Data Sheet- 11 pts Post-lab questions – 9 pts Name Danielle Little I. Purification by Distillation & Filtration Station : 1 pt Problems in Vacuum Set-up A: The hose wasn’t attached. The vacuum flask wasn’t attached to the stand and there was no filter. II. Titrations and Burettes Station : 2 pts Unknown Letter A Vol. of 0.1 M NaOH Used 17.80 mL III. Measuring a Liquid Volume Station : 2 pts Equipment used to Measure 10 mLs Mass of measured 10 mLs (g) % Error in Measurement Rank in Accuracy Your Data PowerPoin t 10 mL graduated cylinder 9.77g 2.3% 3 3 10 mL graduated pipette 9.87g 1.3% 1 2 10 mL volumetric pipette 9.82g 1.8% 2 1 50 mL beaker 5.94g 40.6% 4 4 Table 1. Data on the mass of 10 mLs of distilled water measured using different volumetric instruments. The piece of equipment were ranked from most accurate #1 to least accurate #4 based on your own data and based on information in the PowerPoint on Blackboard “Measuring Liquids in the Chemistry Lab”. IV. Hazardous Waste Station : Match the trash with its proper container: 2 pt __C___Cracked test tube (clean) A. Hazardous Waste Bottle __D___Rusty razor blade B. Trash Can ___D__Pipette broken while filled with HCl C. Broken Glass Container
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