CHEM 2040U Study Guide - Volumetric Flask, Graduated Cylinder, Pipette
Document Summary
All glassware used in this experiment was rinsed with 1 m hcl (aq) followed by type 2 water prior to use. Transfer pipettes and volumetric flasks were all grade a. aqueous solutions were prepared with type 2 water. %transmittance was measured using a spectronic 20d+ spectrophotometer and a single 10 mm borosilicate glass cuvette. 50 ml of creek water collected from location a was pipetted into a 250 ml beaker using a 25 ml transfer pipette. 2 ml of concentrated hcl was then added via a transfer pipette and the sample was brought to a gentle boil using a hot plate. After boiling for 20 minutes, the sample volume had been reduced to approximately 20 ml. The acidified sample was removed from the hot plate and allowed to cool to room temperature. After confirming that no solid particles were visible, the sample was quantitatively transferred to a 50 ml volumetric flask.