Instructions Save this template and print it out so you have a hard copy of the instructions. Then save it again
with a different name like Spec report. You can then go through and delete each of these instruction text boxes by
clicking on the border and then hitting the delete key. After you complete the report you may go through and delete
any unneeded blank lines. The Results and Discussion section must start on page 2. Delete this text box of
instructions from your report.
Put the following items in the table above:
 First Line – a title for the report. Use the titles of the two experiments to come up with a unique title
of your own that is descriptive of what you did but is not overly long. Think about what the
experiment was trying to accomplish and how it was being accomplished.
 Second line – Your name
 Third line – Type Lab Partner: and your partner’s name
 Fourth Line – The date of submission of the report
 Fifth Line – Type Instructor: your instructor’s name Section: Section number Drawer: Your
drawer number
Delete this text box of instructions from your report.
Experimental
Procedures for this investigation have been previously described. 1,2
Preparation of Stock Solutions
Table 1 provides the data for the preparation of stock solutions of the copper(II) ion, Cu 2+, and
the tetraamminecopper(II) ion, [Cu(NH3)4]2+ from copper(II) sulfate pentahydrate, CuSO 4·5H2O.
Table 1
Formula of absorbing species
Mass of CuSO4·5H2O used to prepare stock solution
Volume of stock solution
Concentration of absorbing species in stock solution
Complete the table above. First give it a descriptive title after Table 1. The descriptive title should allow a
reader to know what the table is about independent of the text preceding it. Add the units of measurement to
any of the descriptions as necessary.
After the table, write a 3 to 4 sentence paragraph indicating how you made your stock [Cu(NH 3)4]+ solution and
its concentration. End the paragraph with the statement “The calculation for the molarity of this solution is
shown below.” and then show in detail the dimensional analysis calculation starting with the mass of the
copper(II) sulfate pentahydrate and ending with the concentration of the tetraamminecopper(II) ion. You may
insert the calculation by hand if you wish.
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1
Schultz, Emeric, “Preparing Solutions & Investigating the Interaction of Light with Matter” in Laboratory
Exercises for Chemistry for the Sciences 1, Spring 2007, Bloomsburg University, pp. 33-37.
2
Schultz, Emeric, “Determining the Concentrations of Dissolved Matter by Spectrometry”, in Laboratory
Exercises for Chemistry for the Sciences 1, Spring 2007, Bloomsburg University, pp. 41-43.
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Results and Discussion
Investigation of Factors Affecting Absorbance
The solutions used in this investigation are described in Table 2.
Table 2
Absorbing Species
Concentration
Complete the table above, including the information and title. Write a paragraph describing what you discovered
about the relationship between absorbance and the other factors that could be varied; the species, the
concentration of a species, the amount of solution the light passes through , and anything else. (This is from the
first week’s experiment.) When you write, be sure that the reader can follow. You cannot just state a result. You
must briefly describe what you did and observed to arrive at that conclusion.
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Standard Curve for [Cu(NH3)4]2+
Insert here the appropriate lead in sentence and then a five-column table containing the information about your
standard curve. (Don’t forget the label and title). Essentially, you will reproduce the Table you made in your lab
notebook. (To insert a table, click Table, Insert, Table and then complete the information. Make the table 1 more
row bigger than you need. Then, to make the top row available for the title, highlight the cells in the top row, click
Table, Split Cells, and then make the number of rows and columns 1 each.)
Then, insert the plot of your standard curve from Excel. Of course, there must be an appropriate lead in sentence.
This plot must have a descriptive title and the axes must be appropriately labeled (description and units) and must
have the equation from the trend line displayed. This plot must be computer generated from a spreadsheet program
such as Excel. It must be imbedded in your text and, therefore, NOT be attached as a taped or glued object.
Delete this text box of instructions from your report.
Analysis of Unknown Solution
Write a paragraph describing what you did to analyze your unknown and how you determined the concentration.
Show any calculations you performed. Conclude with a statement that identifies your unknown number and it’s
original concentration.
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How to do superscripts and subscripts:
In Font Box, click on arrow in lower right hand corner, and click the appropriate box, OK, type the
character(s), In Font Box, click on arrow in lower right hand corner, and unclick the appropriate box, OK.
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