Prelab for Calibration of Volumetric Glassware Essay Example for Free

Preresearch laboratory for Calibration of Volumetric Glassware Essay1). confer a 50 mL Erlenmeyer flask. Make sure the glassware is clean and free of any cracks or stars. Also, take note of the temperature of water, as volume varies with temperature 2). Transfer a portion of the water to flask with a pipet and express the mass of flask with the water. Use this data to calculate how much water was transferred from the pipette to the flask. 3). Repeat step two 4 times, ensuring the remaining results are similar to the first trial. Use this data to calculate the mean amount of water transferred and the standard deviation between the data points. Calibration of a 50 mL Buret1). Fill the buret with 50 mL of the temperature-equilibrated water. Be as on the nose as possible in order to obtain reliable data. If the volume changes over a expiration of a few minutes, obtain a new buret. Be sure to obtain the temperature of the water as well. 2). Weigh a 125 mL Erlenmeyer flask with i ts stopper. Again, make sure the flask is sanitary and has no cracks or stars. 3). At a rate of 20 mL/min, open the buret stopper and forgo 10.00 mL of water to submerge into the flask. Remember to seal off the flask as soon as the water stops in order to minimize evaporation. 4). Using the technique of reading meniscuss, record the volume reading for the buret to the hundreds place. The last significant digit may be an approximation.5). Weigh of the halt Erlenmeyer flask with the water on a scale. Determine the quantity of water transferred from the buret by decision the mass difference from the flask with no water vs. the new weight. 6). Repeat the steps from three to 5 four more times for the remaining volume of the buret and bear the whole procedure again with a new 50 mL volume. Remember to record all data. Also, make sure to repeat data that is not duplicated correctly to ensure accurate and precise results. 7). Use the correction data from shelve one in order to find th e true volume of water transferred based on the temperature. shit tables of the recorded data as well as a plot of the correction data with the presumable volume with labeled axis. Perform Calculations 8). Dispose of all glassware and materials accordingly and clean up the lab area. HazardsNo harmful chemicals will be dealt with in this lab. The only safety hazard is to be alert of broken or chipped glassware that may cut ones skin. Make sure to written report any mutilated glassware to TA and accidents in the lab must be handled properly.