benedicts test

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golden
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benedicts test

Post by golden » Thu Sep 22, 2005 1:09 pm

the benedicts test, what is the range of colours that it can go through, and how does the solution react with sugar??????

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James
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Post by James » Thu Sep 22, 2005 3:32 pm

It tests for reducing sugars. The colour change is blue-green-yellow-orange-red. The closer to brick-red, the higher the conc. of reducing sugar present.
Here's some movies, easily found via google:
http://jchemed.chem.wisc.edu/JCESoft/CCA/CCA5/MAIN/1ORGANIC/ORG18/TRAM18/B/MENU.HTM

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victor
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Post by victor » Fri Sep 23, 2005 12:26 pm

Anyone still remember the process of reducing the sugars by benedict reagen? IMMSMR, is it can be reduced because sugar has aldehyde (-CHO) bond?
Please help, I get a lil bit confused 'bout dis thing.. :?
Q: Why are chemists great for solving problems?
A: They have all the solutions.

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iri_black
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Post by iri_black » Fri Sep 23, 2005 1:45 pm

I know Benedict's test can be used to test the presence of aldehyde also ....so maybe :?
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vinaya
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Post by vinaya » Sat Sep 24, 2005 1:36 am

glucose is an aldehyde
generally, benedicts reagent is used to test if anyone has diabetes.this is called the urine test.
insulin secretion decreases :arrow: blood glucose not converted to glycogen therefore, blood glucose level increases :arrow: blood glucose passed on to urine :arrow: urine tested with benedicts solution :arrow:
as glucose[an aldehyde] is present, benedicts gives positive result

hope u got the idea :lol: :lol: :lol:

PianistSk8er
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Post by PianistSk8er » Sun Nov 06, 2005 8:07 pm

I have a quick question about the Benedict Test...

Why do you need to boil the your solution in order to get the change in color (i.e. the results)???

I really don't know this and it is bugging me! :D

Thanks in advance!

thexboxguy
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Post by thexboxguy » Sun Nov 06, 2005 9:46 pm

heat is typically used to speed up catalysis. i do not know for sure the reasoning for using heat with benedicts test, but im sure its to speed up the reaction

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