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On 06/29/13 10:59,wrote:<br>
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<div>I was wondering what trial 1 and trial 2 and average means on
the freeze depression lab? Is it talking about the average Temp
on trial 1 and trial 2 and take average of those?<br>
<br>
Sent from my iPhone</div>
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From the Lab descriptions you should have done SIX cooling curves
resulting in six freezing point determinations.<br>
<br>
1. Pure Solvent - first time (Trial 1)<br>
2. Pure Solvent - second time (Trial 2)<br>
<br>
Average these to get the freezing point of the pure solvent.<br>
<br>
3. Pure Solvent and ~3 g of solute - first time (Trial 1)<br>
4. Pure Solvent and ~3 g of solute - second time (Trial 2)<br>
<br>
Average these to get the freezing point of the solvent with ~3 grams
of solute added<br>
<br>
5. Pure Solvent and ~6 g of solute - first time (Trial 1)<br>
6. Pure Solvent and ~6 g of solute - second time (Trial 2)<br>
<br>
Average these to get the freezing point of the solvent with ~6 grams
of solute added<br>
<br>
<br>
Theoretically the molar mass you determine for the 3 grams of solute
and the 6 grams of solute should be the same.<br>
<br>
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<pre class="moz-signature" cols="72">--
Andrew J. Pounds, Ph.D. (<a class="moz-txt-link-abbreviated" href="mailto:pounds_aj@mercer.edu">pounds_aj@mercer.edu</a>)
Professor of Chemistry and Computer Science
Mercer University, Macon, GA 31207 (478) 301-5627
<a class="moz-txt-link-freetext" href="http://faculty.mercer.edu/pounds_aj">http://faculty.mercer.edu/pounds_aj</a>
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