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I've received several questions concerning exp 1 so I decided to
send something<br>
to everyone.<br>
<br>
1) There was no pre-lab for exp 1. You should have read a couple
of the appendices <br>
describing the equipment (tells you how many decimal places you
should have<br>
recorded for the buret and pipets) and a change to the volumes
to use for the beaker.<br>
I did send some things earlier this week but you can find this
by going to the following<br>
link and scrolling down to exp 1.<br>
<br>
<a moz-do-not-send="true"
href="http://chemistry.osu.edu/%7Erzellmer/chem1210/lab/lab_1210.htm"><b>Laboratory</b></a><br>
<br>
2) For those of you who haven't done it yet, you should have your
notebook prepared.<br>
Take a look at the syllabus and the following link for an idea
of what should be in there,<br>
<br>
<a moz-do-not-send="true"
href="http://undergrad-ed.chemistry.ohio-state.edu/labnotebook/index.html"><b>Chem
Lab Notebook Exercise - Guidelines for Lab Notebooks</b></a><br>
<br>
The next link shows an example I did for the first 2 steps from
the lab manual for exp 14.<br>
While you don't do exp 14 in 1210 it shows you should write your
procedure in short<br>
concise steps with only 1 or 2 objectives in each step (like a
cookbook). This makes it<br>
much easier to follow when in lab and you are less likely to
make mistakes (check things<br>
off as you do them).<br>
<br>
<a
href="http://chemistry.osu.edu/%7Erzellmer/chem1210/lab/notebook_proc_1210.pdf"><b>My
Suggestions for Writing a Notebook Procedure</b></a><br>
<br>
3) Exp 1 is a FULL report. All the reports are FULL reports exp
the one for exp 7.<br>
If you want to know what a FULL report is look at the following
two links,<br>
<br>
<a moz-do-not-send="true"
href="http://undergrad-ed.chemistry.ohio-state.edu/labreports/index.html"><b>Chem
Lab
Report Exercise - Guidelines for Writing a Lab Report</b></a><br>
<br>
<a
href="http://chemistry.osu.edu/%7Erzellmer/chem1210/lab/chem1210_sample_lab_report.pdf"><b>Lab
Report Format - My Lab Report Example</b></a><br>
<br>
<br>
The 2nd one is my example of what it should look like with
what should go into<br>
each section. It is a little more up to date in that for
most labs there are no report<br>
questions to answer in the manual. For exp 1 there are the
5 questions on page 10<br>
you are supposed to answer and include with the report (some
will be answered<br>
as part of the Discussion section - see rubric).<br>
<br>
For exp 7 you will just be handing in a graph and some pages
from the lab manual.<br>
This is explained at the "Laboratory" link and the TA will
explain it in lab at that time.<br>
<br>
a) The procedure section in the report is simply a bibliographic
reference unless<br>
you made any changes. We do NOT want any details of the
procedure in the<br>
report. Any changes you make should go in this section
below the bibliographic<br>
reference. For example, the changes to the volumes for the
beaker would be included<br>
in this section. Also for exp 1, since the way you used
each type of glassware is<br>
important to the results you should have written this down
in your notebook during lab<br>
and include it in this section. The same for the balance,
did you used the<br>
analytical or the top-loading balance?<br>
<br>
4) Each week you must have your notebook prepared when you walk into
lab.<br>
The TA will come around the lab in the first 10 minutes or so
and check to<br>
see if you have the notebook prepared. If not, you can loose up
to 56pts<br>
depending on how much you have done.<br>
<br>
Any data you take in lab or anything you do related to the exp
should go in<br>
the notebook. Do NOT write in the manual or on another sheet of
paper<br>
(even if you intend to copy it over to the notebook later).<br>
<br>
Record values to the correct sig. fig. and include units. Use
tables when possible.<br>
<br>
Always in PEN (report too). If you make a mistake put a single
line through it and<br>
write the correct data next to it. Do NOT use whiteout,
scribble over the mistake<br>
or erase it.<br>
<br>
The TA will grade your notebook (worth 10 pts) and tell you how
to improve it.<br>
<br>
For exp 1 the TA's will "grade" (critique) your notebook so you
have a better<br>
idea of what to do for the next exp.<br>
<br>
5) Exp 1 report<br>
<br>
a) Write a full report.<br>
<br>
b) Do the lab notebook exercise at the following link,<br>
<br>
<a moz-do-not-send="true"
href="http://undergrad-ed.chemistry.ohio-state.edu/labnotebook/index.html"><b>Chem
Lab Notebook Exercise - Guidelines for Lab Notebooks</b></a><br>
<br>
The exercise is toward the bottom of the page (about halfway
down). Do this<br>
on a separate sheet of paper and hand it in with the report
in the next lab period.<br>
This will count as your notebook grade for exp 1.<br>
<br>
c) I felt the report page and graphing stuff was a little
ambiguous in what should be<br>
done so I asked the person who wrote it to make sure. Go to
the "Helpful Tidbits"<br>
link on my class web page (not Carmen) and you will find a
link for exp 1 which<br>
should help with the lab itself and the report.<br>
<br>
<a moz-do-not-send="true"
href="http://www.chemistry.ohio-state.edu/%7Erzellmer/chem1250/faq/faq_1250.htm"><b>Helpful
Tidbits for 1250</b></a><br>
<br>
d) The graphs have little to do with the table. You will be
making 4 graphs, one for<br>
each piece of volumetric glassware using the data from the
table. That's pretty<br>
much all you need from the table for the graphs. Graph mass
(y) vs. volume (x).<br>
Make sure you use the whole piece of paper and spread the
data out (good use<br>
of the axis) so it takes up most of the space of the graph.
Don't make the labels and<br>
titles huge (use 10 or 12 point font). Everyone should
receive examples of good<br>
graphs in lab. In case you don't you can find them at the
link below. Even the one<br>
graph doesn't take up the full page since I had to shrink it
so I could write on it at<br>
the top and bottom. This graphs shows you choose points
from the best-fit line for<br>
using in your sample calculations for slope (not your actual
data points). The 2nd<br>
graph is a better example of what a graph should look like.
It also shows an example<br>
when you have more than one set of data plotted. You can
bring the legend inside<br>
the graph area to allow the graph to spread out and occupy
the whole page. You<br>
don't need a legend when there's only one set of data
plotted (as for each graph in<br>
exp 1). You do NOT need grid lines for most of the graphs
this semester (you will<br>
for exp 6 graphs).<br>
<br>
<a moz-do-not-send="true"
href="http://chemistry.osu.edu/%7Erzellmer/sample_graphs.pdf"><b>Sample
Graphs</b></a><br>
<br>
There's also a link you can use to help get you started with
Excel if you've never<br>
used it before. It's a simple example for a density graph.
This is similar to what you<br>
are doing in exp 1 but not exactly the same. Go to the
following link and you will find<br>
this, along with other useful links.<br>
<br>
<a moz-do-not-send="true"
href="http://chemistry.osu.edu/%7Erzellmer/excel/excel.htm"><b>Using
MS Excel for Reports</b></a><br>
<br>
Many of my examples use an older version of Excel (Excel
2003). I have a link<br>
explaining the major differences between it and the newer
versions. Again, click tabs,<br>
right-click, etc. and explore what it can do and where to
find things. There are Excel<br>
tutorials and videos all over the web (YouTube). If you
aren't sure about how to do<br>
something after looking for help please ask me.<br>
<br>
e) You will use the graphs to answer report questions 1, 2 and
3 on page 9 in the manual<br>
(in the Discussion section). Turn in all 4 graphs.
Remember, 1 graph per page.<br>
Turn in report questions 4 and 5 (on a separate sheet of
paper or part of the Discussion<br>
section) with your report.<br>
<br>
1) For question 1 when you are discussing precision think
in terms of the uncertainty<br>
of the particular piece of glassware. Since you didn't
do repeated measurements<br>
of a single volume it's tough to address your
precision. Think about how the % errors<br>
agree for each separate piece of glassware and what on
the graph gives you an<br>
idea about precision (it may actually be easier to
answer this by looking at the graphs).<br>
See my help file on line.<br>
<br>
I'm will be sending a follow-up e-mail with a few more specifics
about exp 1 data and graphs.<br>
<br>
I hope this and my on-line help file address the majority of your
questions. If not ask.<br>
<br>
Dr. Zellmer
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