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You've received e-mail from the lab supervisors about this exp.
Here's<br>
some additional help. I know some of you have already started this.<br>
<br>
As always, before attempting the pre-lab you should read the
Discussion<br>
section and review the calculations. Write the procedure so you
have some<br>
idea where the numbers are coming from. Watching the video in the
pre-lab<br>
before writing the procedure will help. It will give you better
idea of what's<br>
going on so the procedure makes sense. The procedure MUST be
written<br>
in your own words in an outline form similar to the example in the
manual<br>
and on the 1220 Lab server (there's another example at a <a
href="https://www.asc.ohio-state.edu/zellmer.1/chem1220/lab/notebook_proc_1220.pdf"
moz-do-not-send="true">link </a>on my class<br>
web page). Pay attention to the equations and the examples in the
manual<br>
since the calculations you'll be doing are very similar.<br>
<br>
The pre-lab essentially consists of two parts. The first part
starts with<br>
a video, which you need to watch all the way through (including the<br>
credits) or you will have have points deducted. Then there is a
series<br>
of questions dealing with the discussion and procedure in the manual<br>
and the video. <br>
<br>
Below this part is the data-entry part of the pre-lab. You'll be
given<br>
numbers similar to what you'll obtain in the actual experiment. You
will<br>
then do the appropriate calculations and enter the numbers (make
sure<br>
you have the correct sig. fig.). In Part B you're adding solute to
the same<br>
test tube from Part A. You start by adding approx. 0.3 g of solute
in trial 1.<br>
Then for trial 2 you add another approx. 0.2 g of solute. There's a
line for<br>
Total Mass of Solute. Think about what this would be in trial 2
based on<br>
what I just stated. Then for trial 3 you add another 0.1 g of
solute and<br>
again have to enter total mass of solute. The f.p. depends on the
conc. of<br>
total solute in each trial. That's about it.<br>
<br>
There is an <font color="#ff0000">INSTRUCTIONS</font> button in a
red box toward the upper-left of<br>
the page. Pay attention to what it's telling you to do in terms of
units, how<br>
to enter the numbers, etc. If submitted correctly, the program will
display<br>
a summary page with all your data and the correct numbers displayed
and<br>
send you an e-mail. If you don't get these two things something may
have<br>
gone wrong and you should try again. If it did work it won't let
you do it<br>
again.<br>
<br>
<b>I sent</b><b> details about this in a previous e-mail about the
on-line pre-labs<br>
and data entry.</b><br>
<br>
The link for the pre-lab is on Carmen and my web page (Laboratory
link)<br>
so if the following doesn't seem to work from your e-mail you can
find it <br>
somewhere. <br>
<br>
<a href="https://uglabs.cbc.osu.edu/1220"><b>https://uglabs.cbc.osu.edu/1220</b></a><br>
<br>
It is due when you walk into lab for exp 2. Of course since it's <br>
on line it means it has to be done before you get to lab. <br>
<br>
The pre-lab is timed (60 minutes). You need to do it in one
sitting. When<br>
you don't we can't guarantee what will happen. If you go beyond 60
minutes<br>
it could time out on you and it will not submit correctly or refresh
due to<br>
limits on the server. Read the directions. <br>
<br>
Remember, <b>you get only one attempt. </b> <br>
<br>
Dr. Zellmer
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