Floating Egg Lab

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Liz Somone Chem 112 TA: Meng Floating Egg Lab Report The goal of this experiment was to determine the density of a solution needed to float an egg, the freshness of an egg, and the way volumetric glassware affects the value and accuracy of density. The types of volumetric glassware used were a 25-mL buret, 25-mL Mohr pipet, 25-mL volumetric pipet, 25-mL volumetric flask and a 25-mL Erlenmeyer flask. I prepared a 1500 mL solution of salt and water in order for the egg to float. Using that same solution I filled a buret that was mounted vertically to the 0 and then drained the solution to nearest 0.00 mL. The solution was then drained into an Erlenmeyer flask and I recorded the weight of the flask before (W1) and after the solution (W2) and then subtract the weight of the flask with the solution from the weight of the flask alone in order to find the absolute mass of the solution (W3). I repeated these steps 2 times. In order to find the density (D) of the solution I took the mass of the solution (∆W) and divided it by volume of the solution in the buret. I then averaged the two densities and found that the average density for the egg to float is 1.05g/mL. | 1st | 2nd | | Buret volume: 24mL | Buret volume: 24.1mL | W2 | 141.87g | 141.83g | W1 | 115.18g | 116.15g | ∆W = W2 – W1 | 25.06g | 25.37g | D = ∆W/buret volume | 1.04g/mL | 1.06g/mL | Average Density = 1.04 + 1.06 / 2 = 1.05 | I repeated the same process for the Mohr pipet as I did for the Buret. I found that the average density required for the egg to float is 1.09g/mL | 1st | 2nd | | Mohr volume: 23.2mL | Mohr volume: 23.02mL | W2 | 140.93g | 141.27g | W1 | 115.87g | 115.90g | ∆W = W2 – W1 | 25.06g | 25.37g | D = ∆W/Mohr volume | 1.08g/mL | 1.10g/mL | Average Density = 1.08 + 1.10 / 2 = 1.09 | I repeated the same process for the volumetric pipet as I did

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