Chemistry lab experiment 2
can you complete chemistry lab report for experiemnt 2..………………………………..
L a b o r a t o r y R e p o r t G u i d e l i n e s | 1
Guidelines for Writing Instrumental Analysis Laboratory Reports
Consult these guidelines in addition to the instructions outlined in the Laboratory Report Questions
section of each laboratory experiment when writing your lab report to ensure that nothing is missing in your
report. The marks assigned to each section of the report in these guidelines are subject to change. The
Chemical Student Handbook (posted to SLATE) also has helpful instructions and resources for writing
Laboratory Report Questions (approx. 50-70 marks, depending on the experiment)
All questions that that you are required to answer in your lab report are found in the Lab Manual
immediately following the procedure section. Complete all of the questions in the order they
appear, and include the question number in your report. Do NOT include additional information
that is not asked for (e.g. purpose, procedure, etc.). Marks will be deducted if additional
information is included. Please see the notes below for further guidelines on answering the lab report
• One sample calculation must be shown for each type of calculation (with the appropriate significant
figures and units).
• Repeated calculations can be performed using Excel, with all calculated results presented in proper
table format as outlined in the General Format section.
• Answer each discussion question in detail, using full sentences and proper grammar. Some questions
may require research; you must reference each source material used.
• Please see the Laboratory Techniques Computer Lab Manual for instructions on how to create
graphs in Excel. Guidelines for formatting graphs are given in the Instrumental Analysis 1 lecture
slides and Chemical Student Handbook, with some additional reminders and an example provided
– Include the input table on same page as the graph (e.g. instrumental response and actual
– Graphs are considered to be figures, and must include a descriptive title (with Figure #) on the
bottom of the graph. Use captions for figure (graph) titles.
– Axes must be labelled with applicable units.
– The data points should be clearly visible with a linear trendline; do not connect the data points
(use the Scatter option when creating your graph).
– Include the linear equation and correlation coefficient on the graph.
– The significant figures for values on the axes must be consistent with the number of significant
figures in your plotted values.
Figure #1: Calibration curve of absorbance versus concentration (ppm) of Ca2+ for standard addition solutions.
y = 0.197x + 0.0165
R² = 0.9981
0.00 1.00 2.00 3.00 4.00 5.00 6.00
Concentration of Ca2+ (ppm)
L a b o r a t o r y R e p o r t G u i d e l i n e s | 2
General Format (6 marks)
• Each lab report must be typed and organized in a format that is easy to follow. Do NOT include
decorative borders in the report.
• See SLATE for the cover sheet as a Word file. Do not include a ‘title page’ in your report; include
only the completed cover sheet at the front of your report. Type in all information directly into the
cover sheet, and where applicable, include the unknown # and identity, and statistical data for the
final results. All results on the cover sheet must be reported with the correct number of significant
figures and units.
• Include a Table of Contents (TOC), with Tables of Tables and Tables of Figures.
• Each page should include headers and footers:
– Header: Title of the lab (top left) and date the report was written (top right)
– Footer: Student’s name and student number (bottom left) and page number (bottom right)
• When numbering pages: the cover sheet is not numbered, the pages for the TOC are numbered
using i, ii, iii, etc, and the first page of the report is numbered 1.
• Tables must be properly formatted (with an example given below):
– All tables must have a Table # and a title that fully describes the data presented in the table.
Use captions for table titles. Titles go on top of the table.
– All tables should include appropriate column titles (and units where applicable).
– The entire table must appear on the same page (do not split one table over two pages)
– Do not repeat units in a table column; include the units only once in the header
Table #1: Concentration and absorbance of calcium in standard addition solutions for calibration of the AAS.
Standard Solution Ca2+ Concentration (ppm) Absorbance
Ui 0.00 0.117
Ui + 1 1.00 0.205
Ui + 2 2.00 0.410
Ui + 3 3.00 0.615
Ui + 4 4.00 0.826
• Figures must be properly formatted:
– All figures must have a Figure # and a title that fully describes the figure. Use captions for
figures titles. Titles go on the bottom of figures.
– For all labs in which you are required to produce diagrams of the solution preparation
procedure (calibration standard and unknown sample preparation), diagrams must be
computer-generated, fully labeled and include all details of the preparation procedure.
• Equations must be written using an equation editor program
Spelling/Grammar/Clarity of Comments (2 marks)
• Ensure that your spelling and grammar are correct, and use past impersonal tense to write your
• Use proper scientific terminology, and do not abbreviate common terminology.
L a b o r a t o r y R e p o r t G u i d e l i n e s | 3
Significant Figures and Units (5 marks)
• The correct number of significant figures must always be used when reporting measured data and
calculated results. Significant figures must also be expressed correctly when reporting standard
deviation, relative standard deviation, confidence intervals (true value range) and relative error. See
the Chemical Student Handbook or the Instrumental Analysis 1 lecture slides for a complete set of
guidelines and rules regarding the use of significant figures.
• Units must always be shown where applicable.
References (2-3 marks)
• A ‘References’ section must be included at the end of the lab report. All source materials used for the
report (e.g. textbooks, credible websites, journal articles, etc) must be referenced with a corresponding
in-text citation. The Lab Manual must also be included as a reference.
• You must format your citations and references using ACS style. See the Chemical Student Handbook
(posted to SLATE) for the guidelines on how to reference using ACS style.
Accuracy/Unknown Identity (3-5 marks) and Precision (2-5 marks)
You will be graded on the correct identification of your unknown sample and/or how close your experimental
value is to the true value, and may be graded on how close your experimental values are to one another.
Signed/Dated Raw Data
Lab reports must be submitted with signed laboratory notebook raw data taken during the
experiment (the appropriate lab notebook pages must be scanned and included with the electronic lab
report submitted to SLATE). Failure to submit the lab notebook raw data will result in a grade of zero for
that particular lab report. To minimize the handling of paper, students will download and save their
instrumental output results from the instrument’s computer to a PDF file. Prior to leaving the lab, it is
mandatory that the student email themselves, and their professor, the PDF instrumental output file.
The instrument output must also be included with the electronic lab report submitted to SLATE. Failure to
e-mail the professor the PDF instrumental output file will result in a grade of zero for that particular lab
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