Natural Science Forum / Chemistry / Electrochemistry / July 2008

I built a water electrolysis chamber.  I am using MgSO4 in H20 as the
electrolyte.
I built it with 2 plexiglass boses, each with one side open, that bolt
together on the open side, with a small chamber between the 2 boxes,

I posted a topic here titled "Electrolysis question: MgSO4, H20" and I
just noticed that it is now posted on natscience.com.
Can anyone explain why this happened?
It seems like something wrong is going on there, I didn't agree to

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Hello
Some of you have succeeded in identifying potentiometric of Fe (III) using
the membrane electrode with tetraferrate?
I've not ...

Hello
I've been testing the determination of potentiometric Fe (III) using the
carbon electrodes, but I find that responds but to changes in pH !
Some of you found it work?

Hello
I have two questions  about batteries:
- The seller of a electronic device  told us that the  Lion batteries
of a newly purchased product require the same  startup conditioning

Probably naive and ignorant thoughts, but how else does one learn ...
1)  The surface area to volume ratio is no greater for a convoluted surface
than a flat plate.  So how is the sponge electrode an advantage? over a
flat plate of the same mass, that is.

What is the most promising tech today for battery electric vehicles?
Lithium Ion looks good. But what is the next "big thing" in energy
density?

With gasoline at $4/gal. and electricity at $0.10/kW-hr (residential rate),
even a perfect IC engine would have higher fuel costs.  $4 buys 40 kW-hr,
which is 40 X 3600 BTU = 144,000 BTU.  One gallon of gas contains 120,000
BTU.  So at 100% efficiency for both, the ...

Is there any example of an oxygen cathode with an acid aqueous electrolyte?    
The potential would be 1.2 V instead of 0.4 and the problem with carbon
dioxide depleting the alkalinity of the electrolyte would be avoided.  You
would have to use an H+-selective membrane.

Where is the energy stored in a lead acid battery is it in the lead or the
acid water solution.
Lucky

I recently replaced my two Interstate SRM27 (85ah) with SRM27X (105ah)
and would like a non-destructive test of their ah capacity. I propose
using and inverter to load each battery at 10A and measure the
terminal voltage with a usb data-logger. Interstate give a table of o/

The reason I want to know is that I overcharged my motorcycle battery
and the water is gone. Did the H2SO4 boil away as well? Or is it a
solid which precipitated out?
I'm going to put my safety glasses on and add distilled water...