# Composition And Seperation Lab Report

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COMPOSITION AND SEPERATION LAB REPORT INTRODUCTION The purpose of this experiment is to study the physical and chemical properties of popcorn, sand, salt and iron fillings in order to separate them out and to find the percent composition of them. The percent composition of a component in a compound is the percent of the mass of the component in relation to the total mass of the compound. By using the percent composition, one can find the amount of water that is in a kernel of popcorn or find the total percent recovered when separating out different components of a solid mixture. EXPERIMENTAL Please refer to the Chemistry 184 Laboratory—Fall 2011 website: Lab #2 Composition and Separation Lab *Note that instead of using a Bunsen Burner, a ceramic hot plate was used. *Note that only one kernel of popcorn was used instead of several. RESULTS Table 1. % Water Composition of Popcorn Popcorn Type | % Water Composition | Pop Perfect | 0.087 | Food Club | 0.104 | Jolly Time | 0.05 | Orville Redenbacher | 0.081 | Act III* | 0.106 | * Indicates Popcorn brand studied Example Calculation 1. % water composition = Mk- Mp x 100 where Mk = mass of kernel Mk Mp = mass of popcorn % water composition= (.1115) - (.0993) x 100 = 10.6% (.1115) Table 2. Mixture Separation Results Popcorn Type | Mass of Stock (g) | Mass of Popcorn(g) | PopcornComp.(%) | Mass of Metal(g) | Metal Comp.(%) | Mass of Sand(g) | Sand Comp.(%) | Mass of Salt(g) | Salt Comp. (%) | Total Mass Recovered | Total % Recovered | Pop Perfect | 35.53 | 2.139 | .0602 | 15.99 | .4501 | 10.48 | .2949 | 9.422 | .2652 | 38.04 | 1.071 | Food Club | 33.32 | 1.595 | .0479 | 13.05 | .3917 | 12.87 | .3862 | 5.249 | .1575 | 32.76 | .9833 | Jolly Time | 29.89 | 3.496 | .1170 | 12.08 | .4012 | 6.546 | .2190 | 7.291 | .2439 |