Methods For The Determination Of Density

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Sadman Binzaman Experiment 1: Methods for the determination of density Wednesday, September 7th, 2011 11:30 AM – 2:50 PM Post Lab Questions 1. How would you determine the density of gas? Density is measured by dividing the mass of the substance by the volume of the substance. First measure the mass of the empty container and then measure the mass of the container with the gas inside. The difference between the two measurements should give you the mass of the gas alone. Knowing the mass of gas you have divide that by the volume of the container it is in and that will get you the density of the gas. 2. Liquid A is red and has a larger density than liquid B that is blue in color. Liquid A and liquid B do not dissolve each other (they are immiscible). Describe what you expect to see when liquids are combined in a test tube. When two immiscible liquids are placed in a test tube, the liquid with the smaller density settles on top of the liquids with the greater density. In this situation Liquid A will sink to the bottom of the test tube and Liquid B will float on top. 3. An unopened can of Coke or Pepsi will sink when put in water. An unopened can of Diet-Coke and Diet-Pepsi will float. Try the experiment to verify the assertion. Explain the phenomenon. Coke is a soda made of ingredients denser than water (such as sugar). However, Diet Coke ingredients (such as its artificial sweeteners) are less dense than water. Because of this, the denser Coke sinks in water while the less dense Diet Coke floats. 4. Measurement uncertainties are given in this experiment. Are they reasonable? Explain. The measurement uncertainties given in this experiment are not reasonable considering the quality of equipments used throughout the experiment. Measurements were not entirely accurate. For example, scales needed to be

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