Frogfot's page

Contents of page:
Syntheses: acetamide, nitric acid, chlorine, rust...
Pyrotechnics: gunpowder, smoke devices, low-explosives...
Electronics: H-bridge, Light detector...
Misc things: ball-mill, water jet vacuum pump...
Plans: Planned syntheses and projects...
Useful Tables: Mendeleevs table, solubility tables...

Links: Useful links

News:

12.07.06 Hihi, while I was trying to focus all my brain cells (which is not an easy task) to come up with a new and original domain name I totally forgot that hosting renewal date has passed by. So this was the reason why page was down for couple of days.
Anyway, the most appealing products of my brain activity came out to be "chempage.org" and "commonchem.org", since both of these options sounded quite lame, and I wanned to give it a rest, I decided to keep the old name.. and anyway, I'm used to the old one..

PS. For those who needs some inspiration here's a good page, that came up in nearest months: Tecnotacho (www.tecnotacho.com). Page contains some original projects with technical descriptions. Something that particularly raises my attention is the Ranque-Hilsch vortex tube, used to separate high velocity air into hot and cold air, that is, by some mysterious way transfer kinetic energy of air from one place to another OO

18.06.06 Its been really long time since last update.. Had some other things that needed to be done.
Was planning to change the direction of this page more towards "dry" experiments, that is, less chemistry experiments and more electronic related things and other equally fun projects. The few chem experiments I have, will ofcaurse remain on the page.
Oh, and no, I'm not doing this due to problems with the nazi police/other likeminded people.
The "dry" experiments would include things like construction of fume hood, different homemade equipement for home lab etc.. Although there could pop up some chem experiment, cause, for example, I'm not finished with the H₂SO₄ project.
This change will come with a change of domainname.. This will be done in middle of summer when the bill for domain comes in. Though I didn't yet came up with any good domainname that would include "basic syntheses", "chem related tools/equipement" and "electronics". After 2 years I realised that "frogfot.com" didn't include any of these things, at least literally it didn't..
Oh, suggestions for the new domainname are welcome, cause I have a limited imagination :)

04.12.05 Updated the links page with some chemistry related pages and found that many people keep so called to-do lists of planned projects. Realised that I wanna have one of those too, so I added a new section on my planned projects&synths.

19.11.05 Long time since last update, been busy.. Just made some minor changes: added a classification scale on the synthesis page for danger level and cost of required equipement to perform specific experiments. Also finished adding reaction mechanisms to the described syntheses.
Also, some good news that I've forgot to mention.. Several month ago there was a success on the "sulfuric acid project" front. I've successfully tested a sulfur burner and was able to produce nice amounts of sodium sulfite! Mentioned some more details in a thread on SMDB (18.08.05).
Well, H₂SO₄ synth is close..

04.08.05 The HE section is deleted, and will not be here anymore.. maby it's better this way (or so I've been told..)

25.07.05 Updated the text on the transformer power supply.

22.07.05 The page with pics on the recent chlorate cell is added. It's not really finished since I gotta estimate/calc the effective current (true RMS) to get the yield.

18.07.05 Oh, finally did a huge update on chlorate text, now it's much more compleate. Some pics are left to add. The page on my chlorate cell will come the nearest days..

09.07.05 Holy crap, its been 3 month since last update. The upcoming page on new chlorate cells is delayed cause they showed to have crappy airtightness.. Now I was forsed to redesign em.. these ultimate new cells will be better and prettier than ever having about the same specifics as the last cells. They're nearly finished.. gonna take some pics and make a testrun (within nearest 1-2 days).

08.04.05 Added preparation of silica gel.

01.04.05 Done second pre-test of chlorate cell, this time 9 hours. A 47000 uF smoothing cap gave conciderably higher current, see the pre-test plot. After 6 h running, the chlorine loss was estimated by iodometric titration to 0,25 g/24 h. The anode corrosion was not noticeable, yet.
Next pre-test will be done with optimally sized caps, >160000uF, as soon as I find these at the recycling center..
I'll probably monitor the chlorine loss through the whole test.

29.03.05 Finally finished the new chlorate cell and did a test run today. Cells performed nicely though they took considerably less current than was planned. Although I'm using non-smoothener rectifyed current, so my cheap multimeter isn't able to tell the actual current and voltage..
Unfortunately the fan in my power supply had other plans.. it died, so my rectifyer cooler started to get really hot. Therefore I did only 45 min testing. Gotta do some fine adjustments in the cell and then do the actual run. This will happen probably when temp outside stabilizes (closer to the spring). This time I'll do some plots of the run and follow the anode corrosion.
Ofcaurse heres a plot of the pre-run. Note that y-axis represents all units. I've included cell current, voltage and temperature above both cells, and external temperature. Here are some preview pics of the actual cells: ready cells and anode-cathode block. Cells have capacity of 1,7 l each and max calculated current rating of 21 A.

28.03.05 Added another text in misc section about improvised vacuum filtering funnel

27.03.05 Added a new text in misc section on an improvised gas absorber

28.02.05 Updated text on portable shield, some new pics are added.

27.02.05 Text on iodine preparation is heavily edited. Procedures are updated and all yields are finally measured.
Found that lactose procedure is quite irreproduceable, gonna correct it soon..

Here’s some old news.

My e-mail: frogfot@hotmail.com

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