Re: Lab Question

Craig Fryhle (fryhle@u.washington.edu)
Sat, 21 Sep 1996 14:19:18 -0700 (PDT)

Greetings, all. Although the book shows the separations scheme beginning
with the product(s), I would just as soon see the scheme start by showing
the reactants that are mixed together, then the products and how things
are separated. Sometimes a physical separation takes place during the
course of the reaction, hence the reason for showing a scheme all the way
from reactants to isolated product.

CBF

On Thu, 19 Sep 1996, Jolene wrote:

> What it shows in the book and what I think is correct, is to start with
> all of the products and show your separation scheme from there. It is
> assumed that you have done the beginning steps and have a product, in
> this case, aspirin. So the separation scheme just shows how you're going
> to take the aspirin out of the mixture by crystallization and vacuum
> filtration. Also you show any side reactions that may occur (I don't
> think there are any in this lab) and what comes out of the mixture in
> each step, so you will end with a pure product. I hope this helps.
> Jolene
>
> On Wed, 18 Sep 1996 rehwinja@PLU.edu wrote:
>
> > I haven't done my lab left, and I was wondering how I set up the
> > seperation scheme. I studied the one in the book, but I don't see how to
> > use it to set up the reaction in lab. Also, what are you putting for
> > references? (Lab book, class book?) I'd appreciate a message before
> > noon tomorrow. Thanks.
> > Rehwinja
> >
> >
>

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Craig B. Fryhle, Ph.D. Office 206-535-8314 FAX 206-536-5055
Associate Professor Email fryhle@u.washington.edu
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