June 20, 2013
Separation of a Mixture of Solids
Purpose: The purpose of this experiment was to help the student learn how to separate a mixture of multiple different solids and determine the percentage of each component of the mixture.
Procedure: I started off by removing the iron using the magnet, and then I weighed all of the iron I obtained from the mixture in a container I already knew the weight of and calculated the net weight of the iron. Next, I took the remaining contents of the mixture and added it with 50 mL of distilled water in the 100 mL beaker, heated it up to separate the sodium chloride and benzoic acid from the insoluble sand, then poured out the benzoic acid and sodium chloride into a separate cup and allowed I to chill in an ice bath for approximately five minutes. I dried up the sand and calculated the net weight for that. I poured the benzoic acid and sodium chloride mixture into a filtered funnel that caught the majority of the benzoic acid and allowed the sodium chloride to drain through to the cup. I allowed the two separate components to dry up and let the water evaporate and then weighed them out and obtained a net weight for the two of them as well as a mixture percentage for all four components. Data Table 1: Experiment Data | | Grams | Percent of mixture | Iron filings | 1.9 g | 28.8% | Sand | 1.3 g | 19.7% | Table salt | .6 g | 9.09% | Benzoic acid | 2.8 g | 42.4% | Total | 10.6 g | 99.99% |
**NOTE: The initial total mass I got was 6.6 g, however after the experiment was complete I had a mass of 10.6 g. I calculated the percent of mixture using the initial mass of 6.6.
Observations: When heated the benzoic acid foamed up and turned a white color and looked somewhat like a cloud. It also had kind of a glittery coloring to it; it was amazing. Questions:
A. How did your proposed Procedures or flow charts at the beginning of this experiment