nc kwok

Very dangerous experiment and should put a warning in the video. He encountered no accident solely due to good luck ! When I was a student I made the hydrogen gas simply by putting zinc, the outer most metallic layer of an old battery, into a glass bottle filled with 50% of hydrochloric acid. When I though the hydrogen gas is enough for burning I ignited it with a match. . . then explosion occurred. Later, I discussed with my classmate and we concluded that due to the hydrogen in the bottle did not totally displayed the original air but mixed with it in a certain proportion and made it an explosive mixture of gases. Secondly, the jet for burning the hydrogen gas was not small enough to push the gas going out in a higher velocity and the fire sucked back into the the bottle and ignited the hydrogen-oxygen mixture inside. Thus a terrible explosion occurred.

In this experiment, it is lucky that he used the very small needle-tip jet and thus avoided the explosion. I think nobody will be alert without my experience !


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 Electrocution in Water