Density lab

Density lab - Density, Accuracy, Precision and Significant...

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Density, Accuracy, Precision and Significant Figures 1/29/08 Sec 2013 Chem 01 Darlington Mlambo Chelsey Turner
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“Density, Accuracy, Precision and Significant Figures” Purpose: The purpose of this experiment was to perform simple measurements of volume and mass in order to calculate the density of a salt water solution. The aim was to focus on the precision and accuracy of our calculations, with an emphasis on correct significant figures. Procedure: There are three separate parts to this experiment. Part 1 includes making an aqueous solution of calcium choloride. First, a 10.00 mL volumetric flask was weighed to 3 decimal places. 1.612g of calcium chloride was added, as it had to be anywhere within 0.5-3g. This solid was then added to the flask as well as deionized water (about half full). To ensure that the measurement was accurate, an eyedropper was used in order to fill the flask up to the mark with deionized water. The filled flask was then weighed and the density of the solution was calculated. 50.00 mL of an unknown solution was obtained from the stockroom in order to begin part 2. Part 2 includes calculating the density with the measurement of a single sample of the unknown. A graduated beaker with volume markings was weighed. The unknown salt solution was then added to the beaker to a precise amount using the markings on the cylinder. The beaker with the unknown solution was then weighed and the density was calculated. Next,
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another graduated cylinder was weighed. 25.00 mL of the unknown solution
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This note was uploaded on 04/07/2008 for the course CHEM 001 taught by Professor Babikov during the Spring '08 term at Marquette.

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Density lab - Density, Accuracy, Precision and Significant...

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