Separation of a Mixture of Solids

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  • Topic: Water, Flowchart, Process architecture
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  • Published : November 12, 2012
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Separation of a Mixture of Solids
My Flow Chart
First remove iron filings with magnet since this is the only substance in the mixture that it is magnetic and will be attracted to a magnet. Second remove the sand by adding the mixture to hot water, which the other two substances are soluble. Third remove the benzoic acid since this is less soluble in cold than salt by cooling the mixture in the heated water. This will then leave the table salt behind in the water as the last substance.

Data Table 1: Experiment Data|
| Grams (g)| Percent of Mixture (%)|
Initial Mixture| 6.5| 100|
Iron Filings| 1.8| 27.69|
Sand| 1.7| 26.15|
Table Salt| 1.9| 29.23|
Benzoic Acid| 0.8| 12.31|
Combined Total| 6.2| 95.38|

A. How did your proposed procedures or flow charts at the beginning of this experiment compare to the actual procedures of this lab exercise?

My proposed flow chart was very close to that of the actual lab exercise. The only step that I did not include was letting the water evaporate to find isolate the table salt. I suppose I was thinking that it would be estimated by process of elimination. However, I can now that this would not accurately show that true weight and is therefore not scientific.

B. Discuss potential advantages or disadvantages of your proposed procedure compared to the one actually used.

The disadvantage of my flow chart would be that although the end numbers would be closer to the original mass of the mixture, it would not accurately represent the correct percentages and would not account correctly show the error that occurred during the process.

C. How would you explain a sand recovery percentage that is higher than the original sand percentage?

I would explain a sand recovery percentage that is higher than the original sand percentage from water that could still be let in the sand if it has not been given the proper time to fully dry. However, the a small...
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