Natural Science Forum / Chemistry / Electrochemistry / December 2004

Found this animation of the working of a battery, though I would share it
with you all.
http://www.mpoweruk.com/chemistries.htm
An others?

I am trying to make a conductivity meter and would like to know if any body
can advise on how to make the electrodes?  Do I make them from paladium or
can I use something like alluminum?
Also, would I get an improved conductivity value using an AC signal?

We've been asked to manufacture a "battery booster" for one of the local
battery companies.
The product looks fairly simple - cadmium sulphate, aluminium sulphate,
copper sulphate, magnesium sulphate, di water.

I found this info, and more, on Maxwell's site:
http://www.maxwell.com/ultracapacitors/
"Maxwell Technologies' BOOSTCAP® ultracapacitor products..."
"Our postage stamp-size small cell ultracapacitors extend battery life and enhance the performance and functionality

Stop wasting money on batteries! Use ultracapacitors and AC power instead.

Just wanted to drop by and say, today is the 1-year anniversory since I first
discovered recharging non-rechargeable batteries.

I've read on the internet that copper plating mild steel with copper
sulphate is only possible if you plate with a different metal before
the copper (ie. zinc or nickel).  Is this true?  If so, which metal
would be the easiest/safest (relatively) for a base?  This is my first

enjoy.
http://www.gonavyjoh.net/secret/movies/joh1.wmv

Thanks for the pointers.
As for the equations, I am assuming only diffusion for mass transport
at the moment, because the electrodes are so close to one another that
convection will not occur and migration is canceled out by the buffer

My friend and I are going to do a three-week hiking in Nepal
(Annapurna-circuit). We plan to take our respective digital camera on the
trip. Just 1 small hickup: there will be almost no electricity available.
Eventually, we will have to recharge the batteries, even if we apply ...

I am trying to write a mathematical modell of an electrochemical
process. (BTW thanks to the pointers to the book by Britz, it helped a
lot!!)
The process includes two planar electrodes facing each other. Between

I can shove 100 up my anus !

Hi;
I've been having a recurring problem with rust in my cars gas tank and
I've been hunting through the newsgroups and the web for an
inexpensive solution. I've replaced the filter and when doing so I

I have a bit of an odd problem.
I'm working on the charger for a thermal printer, using 2.2 AH NIMH cells.
The printer runs the step motor about 1S after power comes up, drawing 1A
for almost 1S.

I have a MAHA C777 charger.  I would like to use it to charge 8 AA
NiMH NiMH batteries inside an unventilated meter enclosure.  The C777
normally  uses a magnetic temperature sensor probe to limit charging
rate.