Embedded Files
Percent Composition
Percent Composition
This page contains the Virtual Experiment 6
The assignments that must be completed and submitted in Canvas are the following:
The assignments that must be completed and submitted in Canvas are the following:
Laboratory Report of the experiment using the resources listed below and the CLASS DATA
Post Laboratory Problems and Conclusion paragraph using the RERUNS method
Discussion
Discussion
When water combines to forms these types of compounds they are called hydrates or hydrated salts. Hydrated salts are written as the ionic compound dot number of waters, for example, Na2SO4●10H2O. These compounds can easily decompose, losing the water and forming an anhydrous salt upon heating.
A detailed discussion is available on the Experiment 6 website.
Pre laboratory assignment
Pre laboratory assignment
The Pre laboratory problems are questions about the laboratory assignment, background, definitions or procedure and calculations. These problems should be completed BEFORE coming to the class where the assignment will be discussed.
Exp 6.mp4This video talks about what you will have to do during the laboratory session
Procedure:
Procedure:
The Laboratory Report of the assignment contains questions, data collection, calculation and reporting of results. Use the simulations or class data to complete this assignment.
Part A: Dehydration
Part A: Dehydration
Perform this part of the experiment at home. Describe your observations.
Dehydrating Magnesium Sulfate
Dehydrating Magnesium Sulfate
Doug's Lab - In this video, I demonstrate the manufacture of 1.3kg of anhydrous magnesium sulfate for use as a laboratory desiccant.
Part B: Determination of Percent mass of water in an unknown hydrate
Part B: Determination of Percent mass of water in an unknown hydrate
Complete this part of the assignment using the CLASS DATA. The percent mass of water will be determined from the given data and used to identify the unknown hydrated salt.
Part C: Determination of Percent by mass of Copper
Part C: Determination of Percent by mass of Copper
Use the CLASS DATA provided to complete the determination of the percent of copper in an unknown copper compound.
Exp6PartC.mp4This video shows Exp 6 part C procedure
Exp6PartCreaction.mp4This is the reaction for Part C
Exp6CuOweighing.mp4This is the procedure of drying the sample to a constant mass.
Possible unknowns may include: Cu(NO3)2·3H2O, CuBr2, CuCl2·2H2O, Cu(C2H3O2)2·H2O
The Mole and Atomic Mass
Percent composition, empirical formulas and molecular formulas
Post Laboratory Problems and Conclusion paragraph
Post Laboratory Problems and Conclusion paragraph
The Post Laboratory Problems contain questions that determine your understanding of the laboratory assignment.
While the conclusion paragraph is a summary of what you learned in the assignment. The conclusion paragraph should not just be "this is what I learned" statement but a summary of the assignment, analysis of the data and results of the assignment and critical thinking about what was learned and why it is important. The RERUN method is used to prepare a conclusion paragraph
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