Problem What is the density of tap water and how nates property such as density be apply to identify unknown substances?
Hypothesis This experiment will analyze the density of water is less dense then any(prenominal) unknown substance.
Materials: Chemical splash goggles Laboratory relief
Laboratory apron Graduated piston chamber, 10 - mL.
6 ductile micropipettes Unknown liquid
Tap water
Safety apron, goggles, fire, dangerous vapors, poison, disposal, hygiene
Procedure
1. institutionalize on your goggles and lab apron. Obtain six micropipettes and flesh them 1, 2,3,4,5, and 6. Make sure each micropipette is dry and clean.
2. push through micropipette #1 on the laboratory balance. banner its mass to the snugest 0.01 g and put down this value in Data Table 1.
3. assemble the micropipette with tap water as completely as possible. Place it on the balance and measure its mass to the nearest 0.01 g. record the mass in Data Table 1.
4.
Completely transferral the water in the micropipette into a dry graduated cylinder. Measure and record the intensity of the water to the nearest 0.1 mL. (Note: if the graduated cylinder is made of glass, your eye must be at the uniform level as the bottom of the meniscus to measure the meretriciousness accurately. See figure 2-1)
5. Using micropipettes #2 and #3, repeat go 2-4 so that you have three sets of mass and volume information for water.
6. Obtain 50 mL of an unknown liquid from your teacher. mathematical function micropipettes #4, #5, and #6 and the preceding procedure to measure the mass and volume of three samples of the unknown. Record your measurements in Data Table 2. trouble: the unknown solution may be flammable or toxic, or they may give off hazardous vapors. bar skin contact and inhaling their vapors. Do not work near a burner flame.
7. Dispose of all chemicals according to your teachers...If you call for to get a full essay, order it on our website: Ordercustompaper.com
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