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Exercise 1 Data Table 1: Mass of Substances
CHEM 181 DL1 Separation of a Mixture of Solids
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Exercise 2
Substance/Mixture Mass (g)
Mixture of Solids
Mass of Paper
Mass of Paper + Iron Filings
Mass of Iron Filings
Mass of 100 mL Glass Beaker
Mass of 100 mL Glass Beaker + Sand
Mass of Sand
Mass of Filter Paper
Mass of Filter Paper + Benzoic Acid
Mass of Benzoic Acid
Mass of 100 mL Glass Beaker
Mass of 100 mL Glass Beaker + Salt
Mass of Salt
5.1
0.8
2.2
1.4
56.7
58.6
1.9
0.7
1.5
0.8
56.7
57.7
1
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Data Table 2: Mixture Summary
About 0.02% was recovered through the separation techniques.
1. What percent of the total mass of mixture of solids (Init ial) was recovered through the separation techniques?
Particles that didn't get separated completely or being lost on containers.
2. Describe possible sources of error to account for any deviation between the % of the total mass of mixture of solids (init ial) and the sum of separated components.
The most challenging step to perform in the separation procedure was separating the benzoic acid because it stuck to the sides of the cup. I ended up adding too much water to get as much of the benzoic acid as I could. This cause me to have to boil the salt solution longer than the experiment suggested. I'm not sure what could have been done to help this problem.
3. What was the most challenging step to perform in the separation procedure? What would you suggest to make the step less challenging?
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Substance/Mixture Mass (g)
Mass of Mixture of Solids (Initial)
Mass of Iron Filings
Mass of Sand
Mass Benzoic Acid
Mass of Salt
Substance/Mixture % of Total Mixture
Mass of Mixture of Solids (Initial)
Mass of Iron Filings
Mass of Sand
Mass Benzoic Acid
Mass of Salt
5.1
1.4
1.9
0.7
1.1
100%
27.45%
37.25%
13.72%
21.56%
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