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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: bewitchedsw on October 04, 2004, 05:39:36 PM

Title: Designing an experiment
Post by: bewitchedsw on October 04, 2004, 05:39:36 PM

In lab, we have to design an experiment that determines the concentration of sucrose in a solution.  We will receive the solution in class on Wed, right now we only need to design the experiment and tell the instructor what we will need to determine the concentration.

I want to get a good grade, but I don't want to have someone else do the work for me.  Can someone point me in the right direction?

I think I would first determine if sucrose is present by a benedicts test.  I am not sure at all how to determine the concentration.

Thanks!

Sam

Title: Re:Designing an experiment
Post by: jdurg on October 04, 2004, 10:16:11 PM

Well, sucrose is NOT a reducing sugar so it will not react at all with Benedict's Reagent, so that experiment will have to be nixed.   :P  However, in an acidic environment sucrose will decompose into glucose and fructose.  Glucose and Fructose are both reducing sugars, so they will both react with Benedict's Reagent.  

Take a look at this site, and you will find everything you need.  http://encyclopedia.thefreedictionary.com/Benedict's%20reagent (http://encyclopedia.thefreedictionary.com/Benedict's%20reagent)