Seperation of a Mixture of Solids

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Separation of a Mixture of Solids Purpose To become familiar with separating a mixture of solids, as well as to become familiar with separation techniques dependant on the chemical make-up of a substance. Data Separation Flowchart Initial Mixture (iron fillings, table salt, benzoic acid, sand) | | | | | | | | | | | Put mixture in a cup and hold the magnet over it. | | | | | | | | | Mixture - iron fillings (table salt, benzoic acid, sand) | | | | | | | | | | | Boil mixture to dissolve table salt and hopefully benzoic acid. | | | | | | | | Filter out water with table salt (and hopefully benzoic acid) | | | | | | | | | | | | | | | | | | | | | | | | Mixture - iron fillings and sand (table salt and benzoic acid | | Data Table 1: Experiment Data | | Grams | Percent of mixture | Iron filings | 1.6 | 23.8% | Sand | 1.7 | 25.0% | Table salt | 1.7 | 25.0% | Benzoic acid | 1.7 | 25.0% | Total | 6.7 | 98.8% | Hands-on Labs, Inc Observations I observed that while decanting the sand-table salt-benzoic acid mixture that it appeared that some of the sand may have been decanted out of the beaker as well. I also observed that while filtering the benzoic acid-salt mixture that some of the mixture stuck to the sides of the filter and may not have been filtered properly. This may affect the mixture percentages as to that the separate substances may not be as pure as they should be. Calculations -Total Mixture Weight- 6.9 g -Total Mixture Weight based on weight of individual substances- 1.6 g (iron fillings) +1.7 g (sand) + 1.7 g (table salt) + 1.7 g (benzoic acid) = 6.7 g total -Amount of mixture lost during experimentation- 6.9 g – 6.7 g = 0.2 g -Percentage of Mixture- 1.6/ 6.7 = 23.8 % (iron fillings) 1.7/ 6.7 = 25.0% (sand) 1.7/ 6.7 = 25.0% (table salt) 1.7/ 6.7 = 25.0% (benzoic
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