27 Apr
2011
27 Apr
'11
8:49 a.m.
On 27 Apr 2011 at 9:23, Mark Tapley wrote:
Did this with the kids, 12V supply = jump cables from
my car,
foil "electrodes" in salt water, inverted test tube on a long holder,
and a candle to verify the type of gas (used the holder to move the
tube over the candle). Lucked out and collected the Hydrogen on the
first try (well, it wasn't really luck. The electrode with twice as
many bubbles had to be the H2.) They were suitably impressed. I was
impressed how fast the aluminum foil went away (into solution). --
In the same vein, have you ever fooled with liquid rectifiers? The
anode is aluminum; the cathode is usually lead in a soluton of sodium
bicarbonate.
--Chuck