Jonathan O'DonnellCHM 3120C05/15/2014TA: Darrell CerratoLab 1. Calibration of Volumetric GlasswareIntroduction:This experiment is designed to teach proper techniques for using an analytical balance and volumetric devices. Accuracy of volume measurements is important in analytical chemistry but all volumetric glassware has errors and obscurities related to the observed measurements. Tiny damage to glassware from aging, abuse, and chemicals can create systematic errors in observational measurements. Volumetric pipettes and burettes can be used for fairly precise measurements if properly standardized. The goal of this exercise is to measure volume and mass, evaluate the accuracy of the measurements, and use the data to calculate density or standard deviation. This experiment is performed by first weighing the mass of a coin, the mass of paper to be weighed, and then measuring the two objects together to obtain the average mass of a coin. Following the introduction of calibration with an analytical balance, we are told the volume of water to transfer into an Erlenmeyer flask or beaker by pipette/burette to obtain the actual volume delivered using the density of the water at the given temperature. The process will be repeated three times for each given volume of water. Accordingly, I will evaluate the error in the ability to read glassware accurately by calculating a combined standard deviation of the total mass of the part, the tolerance level for each volume of water delivered, and the density of the water.Experimental:In order to evaluate the accuracy of an analytical balance or volumetric device, we need to repeat each test three times and then calculate the average. Obtain a coin (a penny, nickel, or d...... middle of paper ...... with the correct number of significant figures. This first laboratory exercise has two main objectives. The first objective is to practice the classical techniques of weighing with balances and volumetric measurements using glassware. For much of analytical chemistry, the accuracy of the entire analysis depends on how accurately the standard ( or standards) are compared The second objective is to introduce and use certain statistical data processing concepts. The carefully obtained results are useless if their values ​​and limits are not known. in this laboratory exercise: accuracy and precision (absolute and relative error (error propagation); ; significant figures; Gaussian distribution (normal); mean (median) ;.