Reference no: EM131358350
Lab Assignment: Ideal Gas Law
Pre-Lab Questions
1. What is it in yeast that aids in the decomposition of hydrogen peroxide?
2. List the ideal gas law and define each term with units.
3. How many moles of O2 were produced in a decomposition reaction of H2O2 if the barometric pressure was 0.980 atm, the temperature was 298 K and the volume of O2 gas collected was 0.0500 L?
4. If you decomposed 10.00 mL of 100% H2O2, how many moles of O2 could you theoretically obtain?
Calculations
The goal is to find the percentage of hydrogen peroxide in the solution! This can be found by working through the following steps.
1. Convert the temperature of the water from oC to Kelvin (K). Use the equation K = oC + 273. This will be your value for absolute T or the temperature in Kelvin.
2. If necessary, convert the barometric pressure in the room from mm Hg to atmospheres (atm).
Divide the measured pressure from the Data section by 760 mm Hg. This will give you pressure (P) in atmospheres.
3. Convert the volume of oxygen from mL to liters (L).
4. Rearrange the ideal gas law to solve for n.
5. You are now ready to solve for the number of moles of O2. Be sure the units cancel so that you end up with only the moles of O2 left.
6. Calculate the theoretical number of moles of O2 there would be if the hydrogen peroxide were 100%, and not an aqueous solution.
7. Find the percent hydrogen peroxide.
8. You can also easily determine the reaction rate. To do this, divide the total volume of oxygen collected by the total time of the reaction.
Post-Lab Questions
1. Was the calculated percentage of hydrogen peroxide close to the same as the percentage on the label?
2. Considering that catalysts are not consumed in a reaction, how do you think increasing the amount of catalyst would affect the reaction rate for the decomposition of hydrogen peroxide?
|
Leadership research and effective leaders and leadership
: Analyze the importance of three (3) key aspects of effective leadership research then examine (2) outcomes this research reveals about the behaviors of effective leaders.
|
|
Compute the reduced stiffness and compliance matrices
: Compute the reduced stiffness [Q] and compliance [S] matrices, and the intralaminar shear stiffness [Q∗ ] and compliance [S ∗ ] matrices for a lamina with E1 = 35 GP a, E2 = 3.5 GP a, ν12 = 0.3, G12 = 1.75 GP a, G23 = 0.35 GP a.
|
|
Explain the decline in equilibrium tips rates
: The table also reports information on 10 year TIPS rate from 2003-2014 Link. Calculate the average level of the TIPS yield from the period prior to the Global Financial Crisis (2003-2008) with the average from the pre-crisis period. Can the declin..
|
|
Compute the stress vector using cauchys law
: Consider a plane defined in parametric form as F(x, y, z) = (x/a) + (y/b) + (z/c) - 1 = 0.- Compute the stress vector at x = y = z = 60/47 using Cauchy's law.
|
|
Convert the volume of oxygen from ml to liters
: Convert the volume of oxygen from mL to liters (L). Rearrange the ideal gas law to solve for n. You are now ready to solve for the number of moles of O2. Be sure the units cancel so that you end up with only the moles of O2 left.
|
|
Make a sketch of the deformed shape of a beam
: Make a sketch (not to scale) of the deformed shape of a beam subject to a positive bending moment Mx and positive axial load Nx.
|
|
Make a sketch of the deformed shape of a beam
: Make a sketch (not to scale) of the deformed shape of a beam subject to a positive bending moment Mx. Make sure your drawing shows the thickness of the beam; i.e., do not idealize the beam by a line.
|
|
Is there a difference between ethics and morality
: What are your ethics? Where do your ethics come from? Do businesses have ethical responsibility? If they do, to whom do they owe this responsibility? If they do not, why not?
|
|
Compute the extensional coupling and bending stiffness
: Compute the extensional [A], coupling [B], and bending stiffness [D] matrices of a bimetallic (copper and aluminum) strip with each lamina 2 mm thick.
|