Science Lab Experiment: Properties of Mixtures
Object: To determine how to separate the parts of a mixture and to
find out what happens when these elements combine chemically.
Materials: sulfur, iron filings, magnet, alcohol lamp, test tubes,
filter paper, stand and clamp
Method: The sulfur and iron filings were placed on a piece of filter
paper and mixed. A magnet was passed over the mixture and the
filings were removed. See Diagram A.
The mixture of iron filings and sulfur was heated in a test tube.
See Diagram B.
Observations: The mixture of black iron filings and yellow sulfur,
after being heated formed a black material in the test tube
and could not be separated by physical means. It was not
attracted to the magnet.
Conclusions: The black substance formed in the test tube was a compound.
This material had different properties than the iron and sulfur
of the mixture and could not be separated by physical means.