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Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: nicamarvin on January 05, 2010, 11:29:12 AM

Title: speeding Tollens Reagent
Post by: nicamarvin on January 05, 2010, 11:29:12 AM

Hi to you all my friends, my name is marvin and I am from nicaragua I am doing a experiment concerning tollens reagent, well I have a small mirror shopp and I would like to switch from the pouring of silverving agents to the Spraying of the Silvering agents(faster reaction) my question is, does this difference is because of the reducing sugars? is Fructose a faster reducer than Glucose?. :o or is it in the sensitizer?  ???

thank you... :D


oh I think I posted in the wrong place...sorry as this is a organic question... :-[

Title: Re: speeding Tollens Reagent
Post by: Fleaker on January 09, 2010, 11:36:48 AM

I think it is reasonable to say that the difference in the reaction rate between various sugars is due to the ease of which that sugar is oxidized.

If you want speed, you can always pass on the hemiacetal (as most reducing sugars are predominantly ring-closed examples), and instead use an aldehyde.

Title: Re: speeding Tollens Reagent
Post by: nicamarvin on January 11, 2010, 04:02:37 PM

Quote from: Fleaker on January 09, 2010, 11:36:48 AM

I think it is reasonable to say that the difference in the reaction rate between various sugars is due to the ease of which that sugar is oxidized.

If you want speed, you can always pass on the hemiacetal (as most reducing sugars are predominantly ring-closed examples), and instead use an aldehyde.

thanks my friend, I had a feeling that was the case, how about using the simplest of Aldehyde? Formaldehyde in its formalin state? how much should one dilute formalin to use in the silvering prosess? thanks