Introduction
Molar volume is the name given to the volume that one mole of any gas occupies at standard temperature and pressure. In chemistry, many of the materials worked with are gases. It is often easier to measure the volume of a sample of gas, rather than determine its mass. The main purpose of this lab is to determine the molar volume of hydrogen gas experimentally in order to compare it to the theoretical molar volume of ideal gases. In this experiment, a known mass of magnesium is reacted with an excess amount of hydrochloric acid to produce hydrogen gas. The amount of hydrogen gas produced is collected by the displacement of water. This volume is used to calculate the molar volume of hydrogen gas. This data can then be used to compare the experimental molar volume of hydrogen gas and that of ideal gases at STP (standard temperature and pressure), by first using the Combined Gas Law (P1V1/T1=P2V2/T2) to find the experimental molar volume at STP, followed by the Ideal Gas Law (PV=nRT) to find the molar volume of any gas at STP. The partial pressure of the hydrogen gas must be found before the combined gas law can be used. It is found using Dalton's Law of Partial Pressure (P=PH2+PH2O). Data and Results

Mass of Mg UsedVolume of Gas CollectedRoom TemperatureBarometric PressureWater Vapor Pressure 0.0145 g44.4 mL23.0 0C752 mmHg2.81 kPa

Sample Calculations
Combined Gas Law: P1V1/T1=P2V2/T2
Used to find the molar volume of hydrogen gas at STP.
Ideal Gas Law:
PV = nRT
(101.3 kPa)(V) = (1 mol)(8.314 L.kPa/mol.k)(273 K)
V = 22.4 L
Used to find the molar volume of any gas at STP
% Error: 100 x (theoretical value - experimental value)/ (theoretical value) Used to find the percent error.
Dalton's Law of Partial Pressure: P=PH2+PH2O
Used to find the partial pressure of the hydrogen gas.
Mg UsedH2 ProducedMolar volume of H2Pressure of H2Molar volume of H2 at STP% error 0.0017 mol0.0017 mol26.12 L.mol-197.40 kPa...

...MolarVolume of a Gas
Objective: The objective is to determine the volume, of one mole of hydrogen gas at STP using experimental data, known mathematical relationships, and a balanced chemical equation.
Theory:
The goal of this lab is to find the volume of one mole of hydrogen at STP. The experimenters will be working with hydrochloric acid and magnesium to find the objective. The acid in this lab will...

...MolarVolume of a Gas – 10/27/08
Alic Albright, Josh Coleman, Dan Boden, Zach Babin
Purpose:
The pupose of this lab was to make an experimental determination of a molarvolume through reaction of the substance shown: Mg(s) + 2HCl(aq) > MgCl(aq) + H(g)
Introduction:
In this lab, a magnesium ribbon and HCl are combined in a gas measuring tube. When they are...

...combine Magnesium (Mg) with hydrochloric acid (HCl) to determine the molarvolume of hydrogen gas (H2) (converted to the molarvolume at STP) and then, to compare obtained results with the molarvolume of an ideal gas.
To determine the measured molarvolume of hydrogen gas, we are going to use this equation:
The molar...

...DETERMINATION OF THE MOLARVOLUME OF A GAS
AND THE UNIVERSAL GAS CONSTANT
Salve, Ryan Angelo TAB3, Group 6, Mr. John Kevin Paulo Biadomang
Tabor, Frances Hermilyn March 8, 2013
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I. Abstract
This experiment is working with the ideal gas law, which is the summation of Boyle’s Law, where pressure is inversely proportional to volume, Charles’ Law,...

...objective of the experiment was to verify the molarvolume of a gas and gas constant.¹ The method in which was used to determine the volume of H2 gas at standard temperature and pressure and the gas constant was to measure a strip of magnesium and place it inside the gas buret which contained hydrochloric acid, blue dye and distilled water and allow the reaction to occur. Once the...

...Abstract
Molarvolume is the volume that one mole of gas occupies when temperature and pressure are kept constant. The molarvolume of a gas can be determined through evaluating how much gas is given off when the number of moles of the substance is known. To find the volume of gas that will be used to calculate the molar...

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MolarVolume of a Gas Lab Report
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...Gas Pressure and Volume Relationships
Exp. E-1A
A. Obtain a pressure-measuring device as indicated by your lab instructor. Obtain a 60 mL syringe, fill it with air, and connect the syringe to the gas-measuring device as indicated in the figure. Test your apparatus for gas leaks. If you can't eliminate all leaks, see your lab instructor.
B. If necessary, calibrate your gas-measuring device as indicated by your lab...

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