[CHM 112] 2nd Lab question

[Andrew Pounds]

The freezing point of the pure solvent and the freezing point of the solvent with added solute.

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Andrew J. Pounds, Ph.D.
Mercer University, Macon, GA


Mary Caroline Logan <Mary.Caroline.Logan at live.mercer.edu> wrote:

>For the delta T (change in temperature) portion of the formula used to find molar mass, what two temperatures are we to use?
>
>Caroline Logan
>
>
>On Jun 30, 2013, at 5:23 PM, "Andrew J. Pounds" <pounds_aj at mercer.edu> wrote:
>
>On 06/30/13 15:24,  wrote:
>
>To calculate freezing points, for example for trial 1 of pure solvent, do we average all the temperatures for the freezing point? Or do we take the first temperature where it started to level off and use that? 
>
>
>The freezing point is the temperature where the two lines intersect.  Look back at the figure at the bottom of the lab procedures:
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>http://chemistry.mercer.edu/genchem/112Lab3.pdf
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>and also take a look at the example on the class web page in the LAB section.  For each experiment you should have two lines that intersect.  The temperature at the intersection point is the freezing point.
>
>
>-- Andrew J. Pounds, Ph.D. (pounds_aj at mercer.edu) Professor of Chemistry and Computer Science Mercer University, Macon, GA 31207 (478) 301-5627 http://faculty.mercer.edu/pounds_aj 
>
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