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Experiments​

The Molar Volume of a Gas

Experiment #5 from Advanced Chemistry with Vernier

Education Level
High School
College

Introduction

In this experiment, you will determine the molar volume of a gas by conducting a chemical reaction that produces a gas, as shown in the reaction equation below.

{\text{Mg}}\left( {\text{s}} \right){\text{ }} + {\text{ 2HCl}}\left( {{\text{aq}}} \right) \to {\text{MgC}}{{\text{l}}_{\text{2}}}\left( {{\text{aq}}} \right){\text{ }} + {\text{ }}{{\text{H}}_{\text{2}}}\left( {\text{g}} \right)

You will react a known mass of solid magnesium with an excess of hydrochloric acid, in a sealed vessel, and use the pressure change to calculate molar volume at STP.

Objectives

In this experiment, you will

  • Measure the gas production of a chemical reaction by a pressure change.
  • Determine the molar volume of the gas produced in the reaction.
  • Calculate the molar volume of a gas at STP.

Sensors and Equipment

This experiment features the following sensors and equipment. Additional equipment may be required.

Option 1

Go Direct® Gas Pressure Sensor
Go Direct® Temperature Probe

Option 2

Gas Pressure Sensor
Stainless Steel Temperature Probe

Correlations

Teaching to an educational standard? This experiment supports the standards below.

International Baccalaureate (IB) 2025/Chemistry
Structure 1.5.3—The molar volume of an ideal gas is a constant at a specific temperature and pressure.

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This experiment is #5 of Advanced Chemistry with Vernier. The experiment in the book includes student instructions as well as instructor information for set up, helpful hints, and sample graphs and data.

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