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Approximating Avogadro

Approximating Avogadro - Approximating Avogadro's Number...

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Approximating Avogadro’s Number October 10, 2007 Lab Section 2119 Course Number 1391 Yanyan Huang Amanda Quella
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Purpose: The purpose of this lab is to determine Avogadro’s number through the calculations of measurements. Procedure : First, measure and record the mass of a Petri dish and measure the internal diameter to the closest centimeter. Add dry glass beads and create a single layer. Measure the mass of the dish and the beads together. This procedure was repeated three times. To determine the diameter of the molecular film of Oleic acid, a solution must be prepared where the percentage of Oleic acid is less than ten percent. First, 25.0 mL of distilled water is added to a 125 mL Ehrlenmeyer flask. Measure the mass of the flask and water. Then, about 5 mL of Oleic acid is added to a test tube. Add 30 drops to the flask of the acid and mass again. Add 30 drops two more times, measuring the mass after the addition of each set of drops. Next, add enough water to create a depth of about one cm to a large, clean tray. Sprinkle lycopodium powder to lightly cover the surface and place one drop of
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