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Sugar water density table4/22/2024 ![]() ![]() No clamping is necessary.įor the six solutions, prepare a 2.0 M sugar solution by dissolved 274 g of sugar in 400 cm 3 tap water in a 1 L beaker. Place the adapted funnel inside the graduated cylinder with the reservoir protruding from the top of the cylinder and the pipet tip resting on the bottom of the cylinder. The cylinder may be left undisturbed over that period in a classroom or lab so students can observe the process occurring.Īttach a shortened Pasteur pipet (see Teacher Notes) to the stem of the thistle funnel with the piece of rubber tubing. The column layers will remain separated for several weeks, but through osmosis will gradually merge.If provided with masses and volumes, students at various levels could also calculate the densities of each layer during the demonstration. Molarities are shown in the Table, along with densities calculated from the masses of 15.0 cm 3 of each solution. Teachers could display the column and invite students to calculate the molarities of each sugar solution layer using appropriate dilution factors or M 1V 1 = M 2V 2. While the described demonstration may merely serve to illustrate density to younger students, a more quantitative approach could be used with older students when introducing molarity and dilution calculations.A larger (1 liter) graduated cylinder may be used for an even more impressive display, but the quantities of solutions will need to be doubled.Commercial orange food coloring may look too yellow or red, so the orange color is best prepared by mixing a drop or two of yellow and red.Note that the slower the filling rate, the better the layer separation will be. Teachers should test the filling process with water before class so the cylinder will fill at a rate of about 75 -100 cm 3 per minute. To speed up the process and still retain a good separation of solution layers, the pipet should be cut about 2-3 cm from the tip by scoring with a triangular file and snapping off the lower piece of the pipet. ![]()
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