Originally published at: http://boingboing.net/2017/06/28/gravity-defying-science-tricks.html
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Do you mean like so?
The electrolysis was a bit strange. Salt water should give hydrogen and chlorine (not oxygen).
There was plenty of hydrogen from the cathode but nothing from the anode so maybe the prefered reaction was the metal in the thumb-tacks going to meatal ions M–>M+ +e- and not 2Cl- --> Cl2(g) + 2e-
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No! Don’t do it! If you defy gravity too much, you’ll send the Earth off into deep space!
Nope. Electrolysis of saltwater gives hydrogen and oxygen. The role of salt is only to improve water’s conductivity.
Edit: mmh, actually it’s not that clear-cut. I’m too tired to do more research right now.
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