Which of the following would result in an incorrect value for the density of the acrylic slug using the method of neutral bouyancy. Select all answers that would result in an incorrect value. The student does not calibrate the syringe. A student does not stir the solution before determining if the slug is suspended. They measure the density of the unstirred solution. After stirring, the slug rises to the top of the solution. When measuring the density of the thiosulfate solution in which the acrylic slug is neutrally bouyant, the student accidentally drops some of the solution that is in the syringe before obtaining the mass of the solution in the syringe. A student performs the experiment with the room at a higher temperature than room temperature. All of the reagents are at this higher temperature and the balance has been calibrated at this temperature. Before performing the experiments, students from the previous section leave the bottle of thiosulfate open allowing a small amount of water to evaporate and slightly increase the concentration of thiosulfate. The students of the next section use this slightly concentration thiosulfate to determine the density of the slug. During the calibration of the syringe, the student pulls the plunger farther back than the 1 mL mark each time that he collects pure water for the calibration.
Which of the following would result in an incorrect value for the density of the acrylic slug
using the method of neutral bouyancy. Select all answers that would result in an incorrect value.
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The student does not calibrate the syringe. |
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A student does not stir the solution before determining if the slug is suspended. They measure the density of the unstirred solution. After stirring, the slug rises to the top of the solution. |
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When measuring the density of the thiosulfate solution in which the acrylic slug is neutrally bouyant, the student accidentally drops some of the solution that is in the syringe before obtaining the mass of the solution in the syringe. |
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A student performs the experiment with the room at a higher temperature than room temperature. All of the reagents are at this higher temperature and the balance has been calibrated at this temperature. |
||
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Before performing the experiments, students from the previous section leave the bottle of thiosulfate open allowing a small amount of water to evaporate and slightly increase the concentration of thiosulfate. The students of the next section use this slightly concentration thiosulfate to determine the density of the slug. |
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During the calibration of the syringe, the student pulls the plunger farther back than the 1 mL mark each time that he collects pure water for the calibration. |
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