How Much Gas is Produced?
June 23, 2013
The Company ABC Chemical has asked our group to investigate the gas production from a number of various chemical reactions. The company would like us to measure the amount of product we get when we measure the amount of gas from two reactions. We will then compare our data to the predicted amount which will we will calculate based of the Law of conservation of Mass and Ideal Gas Laws.
1 M HCl (aq)
Syringe with white connectors
125 mL flask with one-hole stopper
50 mL graduated cylinders
Record the Temperature and convert into K
Determine the volume of the Flask and Tygon Tubing you will be using Connect the Pressure sensor to the GLX Machine and then connect the Tygon Tubing to the Pressure Sensor. Weigh the Mass of the Mg Ribbon and The CaCo3 and wrap it into a Kim Wipe. You should weigh out 0.7 g of Mg and 0.3 g of CaCO3 Add at least 16mL of 1.0 M HCl to the Erlenmeyer Flask. More than 16 mL would be better. Hold the flask sideways and place Kim Wipe with your solid wrapped inside the neck of the flask. Put the stopper in place and start the GLX Machine. After 10 seconds tilt the flask in upright position. Stir the flask and products inside and keep hands over the stopper to prevent the stopper from popping off. Once the gas stays at a steady rate or declines, stop the GLX Machine Data
Mass of Solid
Volume of HCl
Volume of Flask
Volume of Tubing
Voume of System
Mols of Gas Generated
Change in Pressure
Calculations and Analysis
Mg(s) + 2HCl(aq) -> MgCl2 (aq) H2 (g)
Na2CO3(s) + 2 HCl(aq) -> 2NaCl(aq) + CO2(g) + H2O
CaCO3(s) + 2HCl(aq) -> CaCl2(aq) + CO2(g) + H2O
N=(0.5)(0.125L)/(0.08206 L*Atm/mol*K)(298 K) = 0.003 mol
0.003 is the same for the Gases. (H2 or O2)
-Amount of Solid needed to react w/ 1.0 M of HCl (Limiting Reactants)
CaCO3 (s) + 2 HCl (aq) -> CaCl2 (aq) + CO2 (g) + H2O (l)
Mg (s) + 2 HCl (aq) MgCl2 (aq) + H2 (g)
Minimum Amount of HCl Needed
*Add an extra 10 mL of HCl to make a minimum of 16 mL used for each reaction
-Experimental P (Pf - Pi)
Experimental Mg Average
Experimental CaCo3 Average
Number of Mols Generated for Each Solid for all trials
Theoretical Pressure (Avg. Mols for Mg & CaCo3)
= .562 atm
= .0597 atm
Discuss your results and observations here. Keep in mind that this is the most important section of the report. Summary: An informative, detailed summary of your relevant results and observations. How did the amount of gas produced by the reaction compare to the amount that was predicted from stoichiometric and idea gas calculations? Goals: A discussion of how and whether the reasons and goals for this investigation were met. If they were not met, why? Learning Progress: What did you learn from this investigation? How can this information be used in the “real world”? Error Analysis: Were significant errors encountered in this investigation (did your team encounter significant differences between your trials)? Discuss at least two (possible) specific sources of error. What specific actions or assumptions (may have) led to the errors? If the investigation were repeated, how could it be modified to eliminate or at least reduce error? Contribution
List the members of your group with your name first.
Describe, in detail, your role(s) in the investigation.
My Role in the Investigation
What did you (each) complete during the actual investigation? What role did you play in completing the lab report? This should be a detailed and cohesive paragraph.