The lab experiment focuses on the introduction and understanding of mixtures. The objective is to separate a mixture of solids through various methods like evaporation and filtration by utilizing the physical properties of each substance. During the experiment, observations were made, such as the forgetting to cover the top while heating the sand, leading to the loss of sample; this contributed to the percent error totals. The tools used in the experiment had some solution attached to them, which should have been weighed before and after. Experiment data table showed that the iron filings constituted 30.56%, sand was 18.06%, table salt was 15.28%, and benzene acid was 1.1 gram, adding up to a total of 6.1 grams or 84.73% of the sample. Finally, the question was raised concerning how well the proposed procedures compared to the actual procedures of this lab
...exercise.
In regards to my proposed procedure, it is similar to the instructions used in the labial annual with the utilization of a magnet for the separation of iron fillings and the use of a filter for sand separation following evaporation. However, filtering out the sand could potentially lead to a disadvantage as it may also filter out the undissolved benzene acid. Additionally, I would not have considered using a bag during the iron magnet filtration.
A higher sand recovery percentage than the original sand percentage could be explained by the presence of contaminants within the sand such as water or benzene acid.
Possible sources of error in this experiment include not covering the top to prevent splatters during heating, premature removal of the mixture from ice before adequate crystallization
and incomplete separation due to use of an inadequate filter.
The experiment may have had sand, NCAA, or benzene acid sticking to the iron due to incomplete drying. It is important to compare the flow diagram for completing the separation to what was actually done in the experiment. Advantages and disadvantages of the chosen separation method should be discussed in order to assess how it may affect the measurement of the separated materials. Prior to conducting the experiment, a flow diagram was thought out and carried out well, with methods similar to those in the lab manual. The magnet was used to separate iron filings and evaporation was used for sand separation. However, there was uncertainty about how to separate the rest of the materials. Simply filtering out the sand may result in filtering out any undissolved benzene acid substance. Using a bag in magnet filtering was not initially considered. These small differences could have greatly altered results and manipulated the entire data table.
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