Separation of Mixtures

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Separation of Mixtures
9/11/11
* Introduction: A compound is a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances by chemical reactions. Unlike a compound, a mixture is a material system made up by two or more different substances which are mixed together but are not combined chemically. There are two kinds of mixtures, homogeneous and heterogeneous. Homogeneous mixtures have the same composition and appearance throughout, while heterogeneous mixtures consist of visibly different parts. The purpose of this experiment is to create and separate a heterogeneous mixture consisting of sawdust, sand, beads, salt, and water. The hypothesis of this experiment is that the materials can be separated back into their original forms with the same masses. * Materials:

- 3.0 grams of salt(NaCl)
-3.0 grams of sand,
-3.5 grams of beads,
- 2.0 grams of sawdust,
- 300mL of water (H20),
- Beakers
-a funnel
-scale
-a hot plate
-dishes
-tweezers
* Procedure:
1) Gather and weigh materials.
2) Pour water into beaker.
3) Measure amount of water.
4) Mix salt, sand, sawdust and beads into water.
5) Use tweezers to separate beads from water and put them in a dish. 6) Put funnel in separate beaker and a filter in the funnel. 7) Pour mixture into the funnel to filter the sand and sawdust. 8) Separate the sand and sawdust from the filter and put them into separate dishes. 9) Boil the water to get the salt out of the water

10) Put the salt into a separate dish.
11) Measure the amount of the beads, sawdust, salt, and sand. 12) Compare results to previous measurements.

* Results:
Mixture Material| Mass Before Mixing| Mass After Separating| % Yield| Beads| 3.57g| 3.57g| 100%|
Salt| 3.0g| .94g | 31.3%|
Sand| 3.0g| g| |
Sawdust| 2.0g| g| |

* Analysis: After initial experimentation, the beads when removed from the...
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