Silvering a Mirror or a Flask by the Tollens’ Reagent
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Silvering a Mirror or a Flask by the Tollens’ Reagent (Demonstration by Lee Marek, PowerPoint Slides by Bob Widing)
Transcript of Silvering a Mirror or a Flask by the Tollens’ Reagent
Silvering a Mirror or a Flask by the Tollens’ Reagent(Demonstration by Lee Marek, PowerPoint Slides by Bob Widing)
Some bottles silvered by Lee Marek
The Tollens’ reaction oxidizes an aldehyde to a carboxylic acid salt.That oxidation drives a reduction of soluble silver ion to silver metal.
D-glucose D-gluconate,salt of gluconic acid
aldehyde
acid salt
Tollens’ reaction with oxidation numbers
oxidation half-reaction
reduction half-reaction
net reaction
Monosaccharide aldoses
Isomerization of ketose-to-aldosevia an enediol intermediate
(Why C2 ketoses are also reducing sugars)
Monosaccharide ketoses
Ring andChain formsof glucose
All OH are equatorial in β-D-glucose
Bernhard Tollens(1841-1918)
![Synthesis of silver nanoparticles using a modified Tollens ... · Tollens’ synthesis method using Tollens’ reagent [Ag(NH 3) 2] + as a source of Ag+ and aldehyde as a reducing](https://static.fdocuments.net/doc/165x107/5e1fe3559368040b55317463/synthesis-of-silver-nanoparticles-using-a-modified-tollens-tollensa-synthesis.jpg)
