Knowledge Base Article
Article ID: 27141 [Last Updated12/13/2001 4:26:07 PM]
Summary:
A sample chemistry lab report
Article:
(first page)
EXPERIMENT 1.4
The Density of Liquids
Mass of graduated cylinder: 25.2 grams
Mass of syrup and graduated cylinder: 82.2 grams
Mass of syrup alone: 82.2 g - 25.2 g = 57.0 g
Density of syrup: 57.0 g / 50.0 mL = 1.14 g/mL
Mass of water and graduated cylinder: 74.1 grams
Mass of water alone: 74.1 g - 25.2 g = 48.9 g
Density of water: 48.9 g / 50.0 mL = 0.978 g/mL
Mass of oil and graduated cylinder: 60.0 grams
Mass of oil alone: 60.0 g - 25.2 g = 34.8 g
Density of oil: 34.8 g / 50.0 mL = 0.696 g/mL
When the oil, water, and syrup were mixed together, the mixture formed
layers, with syrup on the bottom, water in the middle, and oil on the top.
Summary:
In this experiment, we measured the densities of water, table syrup, and
vegetable oil by weighing 50 mL of each. When we divided the mass by the
volume, we got density. We learned that syrup had the highest density
(1.14 g/ mL), water had the next highest (0.978 g/ mL) and oil had the
lowest (0.696 g/mL). We also found out that when we mixed them together,
they formed layers with the most dense substance at the bottom and the
least dense substance at the top. That's because the more dense a substance is,
the more tightly-packed the atoms are. The substances with high density, therefore,
can "squeeze" through the substances with low density.
(end of report)
Notice then that data and observations are on the front page. In the case
of experiments without a lot of data (Experiment 1.1, for example), just
write the observations. For example, "When we filled the balloon with air,
the balance tipped in the direction of the filled balloon."
If you have plenty of room on the front page, you can go ahead and put your
discussion there as well. Don't feel like you HAVE to start a new page to
write the discussion.