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Author: Subject: Video: Dehydration of sugar by sulfuric acid
coccoc
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wink.gif posted on 29-9-2009 at 02:44
Video: Dehydration of sugar by sulfuric acid


This is a very common experiment to demonstrate oxidizing and dehydrating properties of conc. sulfuric acid. hope this remind you memory in collage.(Through I don't have this experiment done in my collage study.)

Dehydration of sugar by sulfuric acid:
http://www.youtube.com/watch?v=jl7oUbu_F64&feature=chann...

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http://www.youtube.com/cforchemistry

[Edited on 29-9-2009 by coccoc]




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watson.fawkes
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[*] posted on 29-9-2009 at 06:56


Quote: Originally posted by coccoc  
This is a very common experiment to demonstrate oxidizing and dehydrating properties of conc. sulfuric acid. hope this remind you memory in collage.
As for staging, the label on the beaker is in front, which obscures the reactants.

The temperature reading is barely legible. You could keep a spot light pointed downward, not shining on the table surface itself, and bring the thermometer under it to display the temperature.
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coccoc
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[*] posted on 30-9-2009 at 18:03


Thanks for you suggestion, I will try to improve it in my next video.



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Sandmeyer
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[*] posted on 30-9-2009 at 18:17


The video of Belousov-Zhabotinsky rxn was really cool!



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woelen
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[*] posted on 2-10-2009 at 09:54


Also in this video you are moving two times between the chemical reaction and the camera. In this video it is more disturbing than in the volcano-video. This is something you definately should not do.

Chemically, you also should mention that the sulphuric acid not only acts as dehydrating agent, but also as oxidizer. The bubbling is due to the oxidizing action, not because of boiling water. Gases like CO2 and SO2 escape from the black mass.

http://woelen.homescience.net/science/chem/exps/H2SO4_sugar/...




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pantone159
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[*] posted on 2-10-2009 at 16:48


I liked that dehydration video. There are some distractions but it shows the reaction well.
Where is the BZ video?
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coccoc
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[*] posted on 2-10-2009 at 20:35


The BZ rxn is in my favourite section, you can check in my channel.

BTW, I thought it was good to zoom it initially, but I will try avoid it from now on as scientist don't like video with shaking.

I also did mention conc. sulfuric acid as an oxidizer, but not about the gases that make it spoongy, simply because the time limit in the video don't allow me to type too much things in it, but I will try to include as many as possible in my video, thanks BTW.




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[*] posted on 7-10-2009 at 12:58


Keep the videos coming, for newbies like me they really help the learning process.

Wow that Belousov-Zhabotinsky reaction is awesome ive never seen anything like it.
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coccoc
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[*] posted on 8-10-2009 at 01:53


Quote: Originally posted by MJ_  
Keep the videos coming, for newbies like me they really help the learning process.

Wow that Belousov-Zhabotinsky reaction is awesome ive never seen anything like it.


Thanks, I will regularly post videos on my channel, so please subscribe my channel and visit often as ther is always something new!




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manimal
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[*] posted on 23-10-2009 at 20:54


You know what would be totally kewl? If you posted a video of a vinegar and baking soda "volcano"!
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[*] posted on 24-10-2009 at 22:38


The vinegar volcano is nothing when compare with Ammonium dichromate volcano
Check this: http://www.youtube.com/watch?v=RrbQHW74hQw




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manimal
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[*] posted on 24-10-2009 at 22:53


I was being silly before, but that is very cool.
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