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Experiment 2 - Lab Report Example

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According to Avogadro, one mole of any gas contains 6.02 × 1023 number of atoms. Therefore, molar mass is expressed in grams per mole; gmol-1. Practically, determining the molar mass of…
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Experiment 2
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Download file to see previous pages Equation for Archimedes buoyancy force is; Fb = g(mobject – mair), where Fb = buoyancy force, g = gravitational acceleration, and m = mass. On the other hand, Avogadro’s laws allows for the determination of a gas’ volume at a given density. Equation for Avogadro’s law is; molar mass/densitySTP = 22.415L/mole. By determining the volume and mass of any gas, it becomes easy to deduce a gas’ molar mass (Peck 68). This experiment involved determining the molar masses of hydrogen and helium; gases that are less dense than air.
Prior to commencement of the experiment, appropriate safety requirements were performed. First, use of safety goggles and lab coats was prioritized. Secondly, water spilled on the floor was wiped in order to prevent slippage of students during the experiment. Finally, any chance of hydrogen ignition was considered, especially adherence to the use of fumed hood and prevention of static electricity.
After the safety considerations, procedural steps of the experiment were performed. The volume of the pitcher was measured using a graduated cylinder. Simultaneously, the balloon was prepared by inflating it with either hydrogen or helium and subsequently weighed. Either excess balloon was cut off or additional pieces of strings added to the balloon setup until the balloon could float in air. Next, the pitcher setup was performed by immersion into water and the balloon gas transferred into the immersed pitcher. Finally, the gas’ volume was measured together with other relevant parameters like air pressure and environmental temperature. As a means of facilitating consistency and precision, three trials were performed for both hydrogen and helium. Data and results from each step of the experiment were recorded in the sheet below.
Based on the data collected during the experiment, the calculated average molar mass of hydrogen is 2.107 g/mol while that of helium is 1.14 g/mol. The ...Download file to see next pagesRead More
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