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Students will receive a cup of
"sludge", which is a mixture of several pure solids and liquids that
are to be separated by applying the lab techniques learned in class this
year. After the pure substances have been separated, the properties of the
substances must be measured, observed, and recorded. The chemicals must be
researched and identified. The final product of this two-week long project
is a neat, organized lab report which will be submitted and graded. The
due date for the report can be found on my homework
page.
I am providing the sludge
guidelines handout that my students receive in class when we pre-lab
the sludge project. All students also receive a rough draft copy of the data
sheets to organize their data for the solids and liquids in their
mixtures. In addition, a final copy of the data sheets for each
solid
and liquid found in their mixtures is
provided. These final copy data sheets need to be submitted with their
reports.
The research needed to identify the properties of
the pure substances in the sludge mixtures can be done in class using chemical handbooks, scientific encyclopedias, and chemical
dictionaries. I am also providing the following links that may be helpful
for doing some of this work online:
www.webelements.com
www.chemicool.com
www.chemfinder.com
www.chemicalelements.com
http://chemlab.pc.maricopa.edu/periodic/periodic.html
http://klbproductions.com/yogi/periodic/
Webelements.com and chemicool.com are good sites for researching elements.
If information is needed on compounds or elements, chemfinder.com
is the best site. The chemlab.pc website is an excellent resource where you
can search for elements by density. The
klbprodocutions.com website can be used to sort elements by any
property (density, boiling pt., melting pt., etc.).
Finally, all students receive a sample comparison
statement handout to use as the model format when writing their data
analysis for the lab report.
